Question

How many electrons does calcium have to give up in order to achieve noble-gas electron configuration?

A. 5

B. 4

C. 2

D. 3

E. 1

Answer 1

Is the correct answer C ?

Answer 2

why should it be C?

Answer 3

@JFraser Calcium is in group 2 of the periodic table, meaning that it has 2 electrons in its (outer) valence shell. So it has to lose those 2 electrons from that to acquire Argon's noble gas structure Ar(2,8,8)

Answer 4

very good, that is correct

Answer 5

Thank you :)