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Created page with "==Key Stage 2== ===Meaning=== Selenium is a solid. ==Key Stage 3== ===Meaning=== right|300px|thumb|The [[Chemical Symbol|chemical symbol..."
==Key Stage 2==
===Meaning===
[[Selenium]] is a [[solid]].
==Key Stage 3==
===Meaning===
[[File:SeleniumSymbol1.png|right|300px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Selenium]].]]
[[Selenium]] is a [[Group 5]] [[non-metal]] [[element]], on the [[Periodic Table]], with an [[Atomic Number|atomic number]] of 34.
===About Selenium===
: [[Selenium]] has the [[Chemical Symbol|chemical symbol]] [[Selenium|Se]].
====Molecular Structure====
: [[Selenium]] can form many different [[molecule]]s including [[Selenium|Se<sub>6</sub>]], [[Selenium|Se<sub>7</sub>]], [[Selenium|Se<sub>8</sub>]].
====Atomic Structure====
: [[Selenium]] has 34 [[proton]]s and 45 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Atomic Number|atomic number]] of 34 and a [[Relative Atomic Mass|atomic mass]] of 79.
: [[Selenium]] is in [[Period]] 4 of the [[Periodic Table]] because it has 4 [[Electron Orbital|electron shells]].
====Properties====
: The different types of [[Selenium]] [[molecule]] are all [[solid]] at [[STP|room temperature]].
==Key Stage 4==
===Meaning===
[[Selenium]] is a [[Group 5]] [[non-metal]] [[element]], on the [[Periodic Table]], with 34 [[proton]]s in the [[Atomic Nucleus|nucleus]].
===About Selenium===
: [[Selenium]] has the [[Chemical Symbol|chemical symbol]] [[Selenium|Se]].
====Molecular Structure====
: [[Selenium]] can form many different [[molecule]]s including [[Selenium|Se<sub>6</sub>]], [[Selenium|Se<sub>7</sub>]], [[Selenium|Se<sub>8</sub>]].
: [[Selenium]] forms a [[Covalent Bond|covalent bond]] with 2 other [[Selenium]] [[atom]]s to produce a [[Simple Covalent Molecule|simple covalent molecule]].
====Atomic Structure====
: The most common [[Stable Isotope|stable isotope]] of [[Selenium]] has 45 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 79.
: [[Selenium]] is in [[Period]] 4 of the [[Periodic Table]] because it has 4 [[Electron Orbital|electron shells]].
: [[Selenium]] has 6 [[electron]]s in its [[Outer Shell|outer shell]] and needs 2 more [[electron]]s to get a full [[Outer Shell|outer shell]] so it can form 2 [[bond]]s with other [[atom]]s.
====Properties====
: The different [[allotrope]]s of [[Selenium]] are all [[solid]] at [[STP|room temperature]].
===Meaning===
[[Selenium]] is a [[solid]].
==Key Stage 3==
===Meaning===
[[File:SeleniumSymbol1.png|right|300px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Selenium]].]]
[[Selenium]] is a [[Group 5]] [[non-metal]] [[element]], on the [[Periodic Table]], with an [[Atomic Number|atomic number]] of 34.
===About Selenium===
: [[Selenium]] has the [[Chemical Symbol|chemical symbol]] [[Selenium|Se]].
====Molecular Structure====
: [[Selenium]] can form many different [[molecule]]s including [[Selenium|Se<sub>6</sub>]], [[Selenium|Se<sub>7</sub>]], [[Selenium|Se<sub>8</sub>]].
====Atomic Structure====
: [[Selenium]] has 34 [[proton]]s and 45 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Atomic Number|atomic number]] of 34 and a [[Relative Atomic Mass|atomic mass]] of 79.
: [[Selenium]] is in [[Period]] 4 of the [[Periodic Table]] because it has 4 [[Electron Orbital|electron shells]].
====Properties====
: The different types of [[Selenium]] [[molecule]] are all [[solid]] at [[STP|room temperature]].
==Key Stage 4==
===Meaning===
[[Selenium]] is a [[Group 5]] [[non-metal]] [[element]], on the [[Periodic Table]], with 34 [[proton]]s in the [[Atomic Nucleus|nucleus]].
===About Selenium===
: [[Selenium]] has the [[Chemical Symbol|chemical symbol]] [[Selenium|Se]].
====Molecular Structure====
: [[Selenium]] can form many different [[molecule]]s including [[Selenium|Se<sub>6</sub>]], [[Selenium|Se<sub>7</sub>]], [[Selenium|Se<sub>8</sub>]].
: [[Selenium]] forms a [[Covalent Bond|covalent bond]] with 2 other [[Selenium]] [[atom]]s to produce a [[Simple Covalent Molecule|simple covalent molecule]].
====Atomic Structure====
: The most common [[Stable Isotope|stable isotope]] of [[Selenium]] has 45 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 79.
: [[Selenium]] is in [[Period]] 4 of the [[Periodic Table]] because it has 4 [[Electron Orbital|electron shells]].
: [[Selenium]] has 6 [[electron]]s in its [[Outer Shell|outer shell]] and needs 2 more [[electron]]s to get a full [[Outer Shell|outer shell]] so it can form 2 [[bond]]s with other [[atom]]s.
====Properties====
: The different [[allotrope]]s of [[Selenium]] are all [[solid]] at [[STP|room temperature]].