Answer:
Oxygen
Explanation:
Oxygen is more reactive because it has small atomic size which has high tendency to attract more electrons.
Non metals
(It’s both halogens and noble gases ) the other ones which are white(not highlighted) are alkali metals, alkaline earth metals, and transition metals :3
I think it is physical change, because the chemicals arent changing theyre jus physically melting, if that makes sense lol
The second one and the 2 last ones
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