Difference between revisions of "Chlorine"
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| + | ==Key Stage 2== | ||
| + | ===Meaning=== | ||
| + | [[Chlorine]] is a pale green [[gas]]. | ||
| + | ==Key Stage 3== | ||
| + | ===Meaning=== | ||
| + | [[File:ChlorineSymbol.png|right|300px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Chlorine]].]] | ||
| + | [[Chlorine]] is a [[Group 7]] [[element]], on the [[Periodic Table]], with an [[Atomic Number|atomic number]] of 17. | ||
| + | ===About Chlorine=== | ||
| + | : [[Chlorine]] has the [[Chemical Formula|chemical formula]] [[Chlorine| Cl<sub>2</sub>]]. | ||
| + | : [[Chlorine]] as 17 [[proton]]s and 18 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Atomic Number]] of 17and an [[Relative Atomic Mass|atomic mass]] of 35. | ||
| + | : [[Chlorine]] is a more [[Reactivity|reactive]] [[Halogen]] than [[Bromine]] but less [[Reactivity|reactive]] than [[Fluorine]]. | ||
| + | : [[Chlorine]] [[Chemical Reaction|reacts]] strongly with [[Hydrogen]] to produce [[Hydrogen Chloride]] which [[dissolve]]s in [[water]] to produce [[Hydrochloric Acid]]. | ||
| + | : [[Chlorine]] is a strong [[bleach]]ing agent. | ||
| + | : [[Chlorine]] kills [[bacteria]]. | ||
| + | : [[Chlorine]] is a pale green coloured [[gas]] at [[STP|room temperature]]. | ||
| + | : An [[atom]] of [[Chlorine]] is missing one [[electron]] from having a full [[Outer Shell|outer shell]]. | ||
| + | : [[Chlorine]] [[ion]]s gain 1 [[electron]] to get a full [[Outer Shell|outer shell]] and become [[Negative Charged|negatively charged]]. | ||
==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| − | [[Chlorine]] | + | [[Chlorine]] is a [[Group 2]] [[element]], on the [[Periodic Table]], with 17 [[proton]]s in the [[Atomic Nucleus|nucleus]]. |
| − | + | ===About Chlorine=== | |
| − | ===Testing | + | : [[Chlorine]] has the [[Chemical Formula|chemical formula]] [[Chlorine|Cl<sub>2</sub>]]. |
| + | : There are two [[Stable Isotope|stable isotopes]] of [[Chlorine]], one with 18 [[neutron]]s and the other with 20 [[neutron]]s. They occur in a [[ratio]] of roughly 3:1 so the [[Relative Atomic Mass|atomic mass]] of [[Chlorine]] is 35.5. | ||
| + | : [[Chlorine]] is the most [[Reactivity|reactive]] [[Halogen]]. | ||
| + | : [[Chlorine]] [[Chemical Reaction|reacts]] strongly with [[Hydrogen]] to produce [[Hydrogen Chloride]] which [[dissolve]]s in [[water]] to produce [[Hydrochloric Acid]]. | ||
| + | : [[Chlorine]] is a strong [[bleach]]ing agent. | ||
| + | : [[Chlorine]] kills [[bacteria]]. | ||
| + | : [[Chlorine]] is a pale green coloured [[gas]] at [[STP|standard temperature and pressure]]. | ||
| + | : An [[atom]] of [[Chlorine]] has only 2 [[electron]]s in its [[Outer Shell|outer shell]]. | ||
| + | : [[Chlorine]] [[ion]]s gain 1 [[electron]] to get a full [[Outer Shell|outer shell]] and become [[Negative Charged|negatively charged]]. | ||
| + | ====Testing For Chlorine==== | ||
#Collect the [[gas]] in a [[Test Tube|test tube]]. | #Collect the [[gas]] in a [[Test Tube|test tube]]. | ||
#Place a piece of [[Litmus Paper|litmus paper]] over the mouth of the [[Test Tube|test tube]]. | #Place a piece of [[Litmus Paper|litmus paper]] over the mouth of the [[Test Tube|test tube]]. | ||
| − | #If the [[Litmus Paper|litmus paper]] is [[bleach]]ed white then the [[gas]] is [[Chlorine]]. | + | #If the [[Litmus Paper|litmus paper]] is [[bleach]]ed white then the [[gas]] is [[Chlorine]] or [[Fluorine]]. |
Revision as of 15:18, 31 March 2019
Contents
Key Stage 2
Meaning
Key Stage 3
Meaning
Chlorine is a Group 7 element, on the Periodic Table, with an atomic number of 17.
About Chlorine
- Chlorine has the chemical formula Cl2.
- Chlorine as 17 protons and 18 neutrons in its nucleus giving it an Atomic Number of 17and an atomic mass of 35.
- Chlorine is a more reactive Halogen than Bromine but less reactive than Fluorine.
- Chlorine reacts strongly with Hydrogen to produce Hydrogen Chloride which dissolves in water to produce Hydrochloric Acid.
- Chlorine is a strong bleaching agent.
- Chlorine kills bacteria.
- Chlorine is a pale green coloured gas at room temperature.
- An atom of Chlorine is missing one electron from having a full outer shell.
- Chlorine ions gain 1 electron to get a full outer shell and become negatively charged.
Key Stage 4
Meaning
Chlorine is a Group 2 element, on the Periodic Table, with 17 protons in the nucleus.
About Chlorine
- Chlorine has the chemical formula Cl2.
- There are two stable isotopes of Chlorine, one with 18 neutrons and the other with 20 neutrons. They occur in a ratio of roughly 3:1 so the atomic mass of Chlorine is 35.5.
- Chlorine is the most reactive Halogen.
- Chlorine reacts strongly with Hydrogen to produce Hydrogen Chloride which dissolves in water to produce Hydrochloric Acid.
- Chlorine is a strong bleaching agent.
- Chlorine kills bacteria.
- Chlorine is a pale green coloured gas at standard temperature and pressure.
- An atom of Chlorine has only 2 electrons in its outer shell.
- Chlorine ions gain 1 electron to get a full outer shell and become negatively charged.
Testing For Chlorine
- Collect the gas in a test tube.
- Place a piece of litmus paper over the mouth of the test tube.
- If the litmus paper is bleached white then the gas is Chlorine or Fluorine.