01-11-2020
Chemistry

contestada

HELP ASAP!!! Why is cobalt (Co) placed before nickel (Ni) on
the periodic table of the elements even though it
has a higher average atomic mass than nickel?
A Nickel has one more proton.

B Cobalt was discovered first.

C Nickel has fewer electrons.

D Cobalt has a lower density.

Respuesta :

riyab31965 riyab31965

01-11-2020

The answer is A or D

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