Paper 1 · Specimen 2018 · Chemistry
The diagram show the outermost shell of element Z.
Z forms an ion with a charge of
A.
B.
C.
D.
Explanation
The shell carries six electrons (a pair at the top, a pair on the left, one on the right, one at the bottom), so Z gains two electrons to complete an octet and forms a 2- ion.
ZIMSEC Combined Science 4003/1, Specimen Paper 2018, Q16