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nataly862011 [7]
3 years ago
12

1.) I am in period two and have an atomic mass of eleven. Who am I?

Chemistry
1 answer:
zavuch27 [327]3 years ago
8 0

1.)Boron

2.)Cadmium has 48 electrons not 121 Mercury has 80 And Copernicum so they all have no 121 electrons

3.)Hydrogen

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Answer:

Q = 10.8 KJ

Explanation:

Given data:

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