Question

Although both of them are metals and cations, we name Ca2+ "calcium ion" while we name Co2+ "cobalt(II) ion" because___________________

a
Calcium is always monoatomic element, while cobalt is always diatomic molecule
b
Calcium is a soft metal, while cobalt is a hard one.
c
Calcium has fixed charge (2+ only), while cobalt could have variable charge (2+ or 3+).
d
Calcium always forms positive ion (cation) while cobalt could form 2+ cation or 2- anion.

Answer 1

is it D?

Answer 2

Do you have any idea?

Where is calcium on the periodic table? Cobalt?

Answer 3

Actually, no. Cobalt is a transition metal in the d-block and so you can have Cobalt (II) and Cobalt (III) with a 2+ and 3+ charge respectively

Answer 4

calcium has a fixed charged

Answer 5

Is it C?

Answer 6

The transition metals want to lose electrons to try to get to the noble gas configuration

Answer 7

It won't necessarily be 2+ and 3+ like Copper for example has a 1+ and 2+ charge

But yes, you are correct!

Answer 8

thank you

Answer 9

Calcium is in that s block so it will give away 2 electrons each time to reach that stable noble gas configuration

Answer 10

My pleasure!