<span>the answer is 1 the 4s1 electron........................
</span><span>
</span>
The _____melting point________ is the temperature at which a substance changes from solid to liquid; _______boiling point_________ is the temperature at which a substance changes from a liquid to as gas; _______vapourisation_________ is the process by which atoms of molecules leave a liquid and become a gas.
Metals :-
Group 1A - Alkali metals ( highly reactive metals)
Non-metals :-
Group 17 - Halogens ( highly reactive non-metals )
<span>Atomic Number 10 is Neon.
1s: 2
2s: 2
2p: 6
3s: 0
3p: 0
4s: 0
3d: 0
4p: 0
5s: 0</span>
