Biology, asked by jaallen244, 1 year ago

which combination forms a covalent bond?

a.an oxygen atom and a hydrogen atom
b.two calcium ions
c.a hydrogen atom and chlorine atom
d.two sodium ions

Answers

Answered by avitaylor101

10

Answer:

option a ................

Answered by DMNS

3

Answer:

I think b and d are the right answer....

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