Answer:
The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell.
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Answer:
I think it was a huge fish. umm not sure
Explanation:
The 3 particles are protons, neutrons, and electrons?
Answer:
Ability to conduct electricity
Melting point
