Difference between revisions of "Relative Atomic Mass"
Line 69: | Line 69: | ||
| style="height:20px; width:200px; text-align:center;" |[[Boron]] has eleven [[nucleon]]s so it has an '''atomic mass''' of 11 and [[Avogadro Constant|6.02x10<sup>23</sup>]] (or 1 [[mole]] of) [[atom]]s of [[Boron]] have a [[mass]] of 11g. | | style="height:20px; width:200px; text-align:center;" |[[Boron]] has eleven [[nucleon]]s so it has an '''atomic mass''' of 11 and [[Avogadro Constant|6.02x10<sup>23</sup>]] (or 1 [[mole]] of) [[atom]]s of [[Boron]] have a [[mass]] of 11g. | ||
|} | |} | ||
− | |||
− | |||
− | |||
− | |||
− | |||
===References=== | ===References=== | ||
Line 86: | Line 81: | ||
:[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 ''Relative atomic mass, pages 26, 112, GCSE Chemistry, CGP, 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 ''Relative atomic mass, pages 26, 112, GCSE Chemistry, CGP, 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 ''Relative atomic mass, pages 62-63, GCSE Chemistry; Third Edition, Oxford University Press, 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 ''Relative atomic mass, pages 62-63, GCSE Chemistry; Third Edition, Oxford University Press, AQA ''] | ||
+ | |||
+ | ====Edexcel==== | ||
+ | |||
+ | :[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Ar (relative atomic mass), page 167, GCSE Combined Science, 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 ''Ar (relative atomic mass), page 23, 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 ''Relative atomic masses (RAM), pages 23, 26, 29, GCSE Chemistry, Pearson, 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 ''Relative atomic masses, pages 17, 28, GCSE Chemistry; 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 ''Relative atomic masses, pages 37, 38, 85, GCSE Chemistry, CGP, 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 ''Relative atomic masses, pages 80, 91, GCSE Combined Science; The Revision Guide, CGP, Edexcel ''] |
Revision as of 06:55, 28 November 2019
Contents
Key Stage 3
Meaning
The Atomic Mass or mass number is the number of nucleons (protons + neutrons) in an atom.
About The Atomic Mass
- Two atoms of the same element may have the same Atomic Number but a different Atomic Mass depending on the number of neutrons in the nucleus. Elements with different mass numbers are called isotopes.
- The atomic mass is not affected by the number of electrons.
- Only the particles in the nucleus affect the atomic mass.
Examples
Hydrogen | Helium | Lithium | Beryllium |
Hydrogen has one nucleon so it has an atomic mass of 1. | Helium has four nucleons so it has an atomic mass of 4. | Lithium has seven nucleons so it has an atomic mass of 7. | Beryllium has nine nucleons so it has an atomic mass of 9. |
Key Stage 4
Meaning
The relative atomic mass or mass number of an element is the number of nucleons (protons + neutrons) in an atom.
The relative atomic mass in grams is also the mass of one mole or 6.02x1023 atoms of the element.
About Relative Atomic Mass
- The relative atomic mass in grams on the Periodic Table tells the mass of a mole of the element. A mole of the element is 6.02x1023 atoms of that element.
- Two atoms of the same element may have the same Atomic Number but a different Relative Atomic Mass depending on the number of neutrons in the nucleus. Elements with different mass numbers are called isotopes.
- The relative atomic mass is not affected by the number of electrons.
- Only the particles in the nucleus affect the relative atomic mass.
Examples
Hydrogen | Deuterium | Tritium | Boron |
Hydrogen has one nucleon so it has an atomic mass of 1 and 6.02x1023 (or 1 mole of) atoms of Hydrogen have a mass of 1g. | Deuterium has two nucleons so it has an atomic mass of 2 and 6.02x1023 (or 1 mole of) atoms of Deuterium have a mass of 2g. | Tritium has three nucleons so it has an atomic mass of 3 and 6.02x1023 (or 1 mole of) atoms of Tritium have a mass of 3g. | Boron has eleven nucleons so it has an atomic mass of 11 and 6.02x1023 (or 1 mole of) atoms of Boron have a mass of 11g. |
References
AQA
- Relative atomic mass (Ar), pages 4-5, 64, GCSE Chemistry, Hodder, AQA
- Relative atomic mass, A, pages 13, 21, 41, GCSE Chemistry; The Revision Guide, CGP, AQA
- Relative atomic mass, A, pages 97, 123, GCSE Combined Science; The Revision Guide, CGP, AQA
- Relative atomic mass, pages 100-1, GCSE Chemistry; Student Book, Collins, AQA
- Relative atomic mass, pages 120, 177, GCSE Combined Science Trilogy 1, Hodder, AQA
- Relative atomic mass, pages 26, 106, GCSE Combined Science Trilogy; Chemistry, CGP, AQA
- Relative atomic mass, pages 26, 112, GCSE Chemistry, CGP, AQA
- Relative atomic mass, pages 62-63, GCSE Chemistry; Third Edition, Oxford University Press, AQA
Edexcel
- Ar (relative atomic mass), page 167, GCSE Combined Science, Pearson Edexcel
- Ar (relative atomic mass), page 23, GCSE Chemistry, Pearson, Edexcel
- Relative atomic masses (RAM), pages 23, 26, 29, GCSE Chemistry, Pearson, Edexcel
- Relative atomic masses, pages 17, 28, GCSE Chemistry; The Revision Guide, CGP, Edexcel
- Relative atomic masses, pages 37, 38, 85, GCSE Chemistry, CGP, Edexcel
- Relative atomic masses, pages 80, 91, GCSE Combined Science; The Revision Guide, CGP, Edexcel