Difference between revisions of "Helium"
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: [[Helium]] has the [[Chemical Formula|chemical formula]] [[Helium|He]]. | : [[Helium]] has the [[Chemical Formula|chemical formula]] [[Helium|He]]. | ||
: [[Helium]] is a [[Noble Gas]]. | : [[Helium]] is a [[Noble Gas]]. | ||
| − | |||
: [[Helium]] is a [[gas]] at [[STP|room temperature]]. | : [[Helium]] is a [[gas]] at [[STP|room temperature]]. | ||
: [[Helium]] [[gas]] is less [[density|dense]] than [[air]]. | : [[Helium]] [[gas]] is less [[density|dense]] than [[air]]. | ||
| − | : An [[atom]] of [[Helium]] has two [[electron]]s | + | : An [[atom]] of [[Helium]] has a full [[Outer Shell|outer shell]] of two [[electron]]s so it is [[inert]]. |
==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| Line 19: | Line 18: | ||
: [[Helium]] has the [[Chemical Formula|chemical formula]] [[Helium|He]]. | : [[Helium]] has the [[Chemical Formula|chemical formula]] [[Helium|He]]. | ||
: [[Helium]] is a [[Noble Gas]]. | : [[Helium]] is a [[Noble Gas]]. | ||
| − | |||
: [[Helium]] is a [[gas]] at [[STP|standard temperature and pressure]]. | : [[Helium]] is a [[gas]] at [[STP|standard temperature and pressure]]. | ||
: [[Helium]] [[gas]] is less [[density|dense]] than [[air]]. | : [[Helium]] [[gas]] is less [[density|dense]] than [[air]]. | ||
| − | : An [[atom]] of [[Helium]] has two [[electron]]s | + | : An [[atom]] of [[Helium]] has a full [[Outer Shell|outer shell]] of two [[electron]]s so it is [[inert]]. |
{| class="wikitable" | {| class="wikitable" | ||
Revision as of 12:34, 31 March 2019
Contents
Key Stage 2
Meaning
Key Stage 3
Meaning
Helium is a Group 0 element with 2 protons in the nucleus.
About Helium
- Helium has the chemical formula He.
- 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.
- 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.
 |
|
| Helium always has 2 protons. The most stable isotope has 2 neutrons. | |