Periodic Table - Revision history

NRJC at 10:35, 20 September 2023

2023-09-20T10:35:50Z

NRJC at 14:37, 5 March 2020

2020-03-05T14:37:10Z

NRJC: /* Key Stage 4 */

2020-02-29T11:53:26Z

‎Key Stage 4

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NRJC at 11:52, 29 February 2020

2020-02-29T11:52:42Z

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Ellen References at 15:58, 17 December 2019

2019-12-17T15:58:05Z

Ellen References at 02:17, 27 November 2019

2019-11-27T02:17:35Z

Ellen References at 20:55, 10 November 2019

2019-11-10T20:55:08Z

NRJC at 18:34, 7 June 2019

2019-06-07T18:34:36Z

NRJC at 10:50, 23 April 2019

2019-04-23T10:50:12Z

NRJC at 10:50, 23 April 2019

2019-04-23T10:50:00Z

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 |[[File:LrKS4.PNG|centre|31px|link=Lawrencium#Key_Stage_4]]
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 ===References===
 ====AQA====
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 :[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Periodic table, page 87, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
 :[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Periodic Table, pages 36, 52-55, 68-71, 86-88, 132-143, Gateway GCSE Chemistry, Oxford, OCR '']

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-|[[File:HgKS4.PNG|centre|31px|link=Mercury#Key_Stage_4]]
+|[[File:HgKS4.PNG|centre|31px|link=Mercury (Element)#Key_Stage_4]]
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← Older revision		Revision as of 15:58, 17 December 2019
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	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; group 7 elements, pages 130-131, 132-133, GCSE Chemistry, Pearson, Edexcel '']		:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; group 7 elements, pages 130-131, 132-133, GCSE Chemistry, Pearson, Edexcel '']
	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; valency, page 41, GCSE Chemistry, Pearson, Edexcel '']		:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; valency, page 41, GCSE Chemistry, Pearson, Edexcel '']
		+
		+	====OCR====
		+	:[https://www.amazon.co.uk/gp/product/1782945679/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945679&linkCode=as2&tag=nrjc-21&linkId=a2db42f7b4bdf10cafaafa3bb9120940 ''Periodic table, page 16, Gateway GCSE Chemistry; The Revision Guide, CGP, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Periodic table, page 87, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Periodic Table, pages 36, 52-55, 68-71, 86-88, 132-143, Gateway GCSE Chemistry, Oxford, OCR '']

← Older revision		Revision as of 02:17, 27 November 2019
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	:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Periodic table; table, group, pages 30, 40-5, GCSE Chemistry; Student Book, Collins, AQA '']		:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Periodic table; table, group, pages 30, 40-5, GCSE Chemistry; Student Book, Collins, AQA '']
	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Periodic table; transition metals, pages 18-19, GCSE Chemistry, Hodder, AQA '']		:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Periodic table; transition metals, pages 18-19, GCSE Chemistry, Hodder, AQA '']
		+
		+	====Edexcel====
		+
		+	:[https://www.amazon.co.uk/gp/product/1782945725/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945725&linkCode=as2&tag=nrjc-21&linkId=694be7494de75af3349537d34e13f7f0 ''Periodic table, page 18, GCSE Chemistry; The Revision Guide, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table, page 20, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Periodic table, page 81, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782948147/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948147&linkCode=as2&tag=nrjc-21&linkId=f63dcd8345f4e49c717b39a228a36c7c ''Periodic table, pages 39-41, GCSE Chemistry, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; atomic number, pages 28-29, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; electronic configurations, pages 30-31, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; elements, pages 26-27, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; group 0 elements, pages 134-135, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; group 1 elements, pages 128-129, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; group 7 elements, pages 130-131, 132-133, GCSE Chemistry, Pearson, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Periodic table; valency, page 41, GCSE Chemistry, Pearson, Edexcel '']

← Older revision		Revision as of 20:55, 10 November 2019
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	===Extra Information===		===Extra Information===
	{{#ev:youtube\|https://www.youtube.com/watch?v=O-48znAg7VE}}		{{#ev:youtube\|https://www.youtube.com/watch?v=O-48znAg7VE}}
		+
		+	===References===
		+	====AQA====
		+
		+	:[https://www.amazon.co.uk/gp/product/1782945571/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945571&linkCode=as2&tag=nrjc-21&linkId=9e29fad914244909903e5e93f8a01d204 ''Periodic table, page 21, 22, GCSE Chemistry; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Periodic table, page 9, GCSE Chemistry, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe10151 ''Periodic table, pages 106, 107, GCSE Combined Science; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Periodic table, pages 109, 117, GCSE Physics; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Periodic table, pages 12-3, 28, 30-33, 36-7, 44-9, GCSE Chemistry; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Periodic table, pages 125, 357, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Periodic table, pages 287, GCSE Combined Science Trilogy 2, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Periodic table, pages 4-5, 19,22-35, 40-41, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945962/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945962&linkCode=as2&tag=nrjc-21&linkId=476bb5c8d1dfb5c08ac81b6d4d1c98d8 ''Periodic table, pages 50-53, GCSE Chemistry, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/178294639X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294639X&linkCode=as2&tag=nrjc-21&linkId=51599bb45a2bfaf7c1b6a978b2ca2616 ''Periodic table, pages 50-53, GCSE Combined Science Trilogy; Chemistry, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Periodic table; and electron structure, page 12, GCSE Chemistry, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Periodic table; and electronic structure, pages 127-8, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Periodic table; Group 0 (noble gases), page 13, GCSE Chemistry, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Periodic table; Group 0 (noble gases), pages 128-9, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Periodic table; Group 1 (alkali metals), page 129-131, 162, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Periodic table; Group 1 (alkali metals), pages 14-15, GCSE Chemistry, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Periodic table; Group 7 (halogens), pages 131-4, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Periodic table; Group 7 (halogens), pages 16-18, GCSE Chemistry, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Periodic table; group trends, pages 40-7, GCSE Chemistry; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Periodic table; history of, pages 134-6, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Periodic table; history of, pages 19-21, 30-1, GCSE Chemistry, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Periodic table; period, pages 30, 46, GCSE Chemistry; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Periodic table; table, group, pages 30, 40-5, GCSE Chemistry; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Periodic table; transition metals, pages 18-19, GCSE Chemistry, Hodder, AQA '']

@@ Line 73: / Line 73: @@
 ===History of the Periodic Table===
-: Scientists always try to look for patterns to help arrange complicated problems. Many different [[element]]s had been discovered so scientists wanted to arrange them based on patterns they noticed. Some scientists arranged them by patterns in [[Chemical Property|chemical properties]] while others tried to arrange them by patterns in [[Physical Properties]] like [[Melting Point]] or [[Relative Atomic Mass]].
+: Scientists always try to look for patterns to help arrange complicated problems. Many different [[element]]s had been discovered so scientists wanted to arrange them based on patterns they noticed. Some scientists arranged them by patterns in [[Chemical Property|chemical properties]] while others tried to arrange them by patterns in [[Physical Properties|physical properties]] like [[Melting Point|melting point]] or [[Relative Atomic Mass|relative atomic mass]].
-: In 1808 a scientist called John Dalton, who created the [[Dalton Model]] of the [[atom]], arranged [[element]]s by their [[Relative Atomic Mass]].
+: In 1808 a scientist called John Dalton, who created the [[Dalton Model]] of the [[atom]], arranged [[element]]s by their [[Relative Atomic Mass|relative atomic mass]].
-: In 1864 a scientist called John Newlands arranged [[element]]s by [[Relative Atomic Mass]] but because he noticed that ever 8th [[element]] had similar [[Chemical Property|chemical properties]] he arranged them into what he called 'octaves'. However, he had not taken into account the possibility that some [[element]]s had not been discovered, so he placed some [[element]]s into the wrong groups just to fit the pattern he thought he had seen.
+: In 1864 a scientist called John Newlands arranged [[element]]s by [[Relative Atomic Mass|relative atomic mass]] but because he noticed that ever 8th [[element]] had similar [[Chemical Property|chemical properties]] he arranged them into what he called 'octaves'. However, he had not taken into account the possibility that some [[element]]s had not been discovered, so he placed some [[element]]s into the wrong groups just to fit the pattern he thought he had seen.
-: In 1869 [[Mendeleev]] was the first to place gaps where the [[element]]s did not fit the pattern but still arranged them by both their [[Chemical Property|chemical properties]] and [[Relative Atomic Mass]]. This enabled [[Mendeleev]] to [[Prediction|predict]] the existence of [[element]]s that had not yet been discovered.
+: In 1869 [[Mendeleev]] was the first to place gaps where the [[element]]s did not fit the pattern but still arranged them by both their [[Chemical Property|chemical properties]] and [[Relative Atomic Mass|relative atomic mass]]. This enabled [[Mendeleev]] to [[Prediction|predict]] the existence of [[element]]s that had not yet been discovered.
-: '''Mendeleev's Periodic Table''' was proven (nearly) correct when new [[element]]s were discovered that fit in the the gaps he had left. This ability of his table to predict the [[property|properties]] of new [[element]]s was what convinced other scientists his [[Periodic Table]] was (nearly) correct.
+: [[Mendeleev's Periodic Table|Mendeleev's '''Periodic Table''']] was proven (nearly) correct when new [[element]]s were discovered that fit in the the gaps he had left. This ability of his table to predict the [[property|properties]] of new [[element]]s was what convinced other scientists his '''Periodic Table''' was (nearly) correct.
-: There were some problems with '''Mendeleev's Periodic Table''' that kept scientists skeptical of it. One such problem was that [[Argon]] has a greater [[Relative Atomic Mass]] than [[Potassium]] which would put [[Argon]] in the [[Alkali Metal]]s.
+: There were some problems with [[Mendeleev's Periodic Table|Mendeleev's '''Periodic Table''']] that kept scientists skeptical of it. One such problem was that [[Argon]] has a greater [[Relative Atomic Mass|relative atomic mass]] than [[Potassium]] which would put [[Argon]] in the [[Alkali Metal]]s.
-: Once the structure of the [[atom]] was investigated by physicists in the early 1900s it was discovered how to correct '''Mendeleev's Periodic Table'''by ordering the [[element]]s by [[Atomic Number]] instead of [[Relative Atomic Mass]]. This produced the modern [[Periodic Table]].
+: Once the structure of the [[atom]] was investigated by physicists in the early 1900s it was discovered how to correct [[Mendeleev's Periodic Table|Mendeleev's '''Periodic Table''']] by ordering the [[element]]s by [[Atomic Number|atomic number]] instead of [[Relative Atomic Mass|relative atomic mass]]. This produced the modern '''Periodic Table'''.
 ===Extra Information===
 {{#ev:youtube|https://www.youtube.com/watch?v=O-48znAg7VE}}

← Older revision		Revision as of 10:50, 23 April 2019
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	: There were some problems with '''Mendeleev's Periodic Table''' that kept scientists skeptical of it. One such problem was that [[Argon]] has a greater [[Relative Atomic Mass]] than [[Potassium]] which would put [[Argon]] in the [[Alkali Metal]]s.		: There were some problems with '''Mendeleev's Periodic Table''' that kept scientists skeptical of it. One such problem was that [[Argon]] has a greater [[Relative Atomic Mass]] than [[Potassium]] which would put [[Argon]] in the [[Alkali Metal]]s.
	: Once the structure of the [[atom]] was investigated by physicists in the early 1900s it was discovered how to correct '''Mendeleev's Periodic Table'''by ordering the [[element]]s by [[Atomic Number]] instead of [[Relative Atomic Mass]]. This produced the modern [[Periodic Table]].		: Once the structure of the [[atom]] was investigated by physicists in the early 1900s it was discovered how to correct '''Mendeleev's Periodic Table'''by ordering the [[element]]s by [[Atomic Number]] instead of [[Relative Atomic Mass]]. This produced the modern [[Periodic Table]].
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		+	==Extra Information==
		+	{{#ev:youtube\|https://www.youtube.com/watch?v=O-48znAg7VE}}