For the strontium question where it asked you to talk about it's chemistry what did everyone say? I talked about it's:
It's valency and how it's in group 2
Then it's Atomic Number and then I explained how it represents the number of protons and electrons.
Talked about how it's a metal and has metallic bonding.
Talked about how it can conduct electricity and briefly explained why.
Then I ended it off with its relative atomic mass and what it means for its isotopes.
I only now just remembered a very easy one I could of talked about: It's flame colour -_- (Facepalm)