Question

Which combination of formula and name is incorrect?a. na+ = sodium ion

b. ca2+= calcium ion
c. n2 ̅= nitride ion
d. f ̅ = fluoride ion
e. o2 ̅= oxide ion?

Answer 1

c is incorrect n3- is the formula for nitride ion

Answer 2

c. and e. are incorrect.

The formula of nitride is N^(3-).

The formula of oxide ion is O^(2-). The formula O_2^(-) represents the superoxide ion.