Difference between revisions of "Helium"
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===Meaning=== | ===Meaning=== | ||
[[File:HeliumSymbol.png|right|300px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Helium]].]] | [[File:HeliumSymbol.png|right|300px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Helium]].]] | ||
| − | [[Helium]] is a [[Group 0]] [[element]] an [[Atomic Number|atomic number]] of 2. | + | [[Helium]] is a [[Group 0]] [[element]] with an [[Atomic Number|atomic number]] of 2. |
===About Helium=== | ===About Helium=== | ||
: [[Helium]] has the [[Chemical Formula|chemical formula]] [[Helium|He]]. | : [[Helium]] has the [[Chemical Formula|chemical formula]] [[Helium|He]]. | ||
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: [[Helium]] [[gas]] is less [[density|dense]] than [[air]]. | : [[Helium]] [[gas]] is less [[density|dense]] than [[air]]. | ||
: An [[atom]] of [[Helium]] has a full [[Outer Shell|outer shell]] of two [[electron]]s so it is [[inert]]. | : An [[atom]] of [[Helium]] has a full [[Outer Shell|outer shell]] of two [[electron]]s so it is [[inert]]. | ||
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
Revision as of 13:01, 31 March 2019
Contents
Key Stage 2
Meaning
Key Stage 3
Meaning
Helium is a Group 0 element with an atomic number of 2.
About Helium
- Helium has the chemical formula He.
- Helium has two protons and two neutrons in its nucleus giving it an Atomic Number of 2 and an atomic mass of 4.
- Helium is a Noble Gas.
- Helium is a gas at room temperature.
- Helium gas is less dense than air.
- An atom of Helium has a full outer shell of two electrons so it is inert.
Key Stage 4
Meaning
Helium is a Group 0 element with 2 protons in the nucleus.
About Helium
- Helium has the chemical formula He.
- The most stable isotope of Helium has two neutrons in its nucleus giving it an atomic mass of 4.
- Helium is a Noble Gas.
- Helium is a gas at standard temperature and pressure.
- Helium gas is less dense than air.
- An atom of Helium has a full outer shell of two electrons so it is inert.
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| Helium always has 2 protons. The most stable isotope has 2 neutrons. | |