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Semmy [17]
3 years ago
14

Gallium, Ga, is a low-melting metal that is used in semiconductors. It is atomic number 31. The

Chemistry
1 answer:
Pavel [41]3 years ago
4 0

Answer:

answer no.1

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹

Explanation:

if you are not sure..between 1st and 2nd just sum all the "exponents" and you should get the atomic number.. in this case 31.

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Answer:

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