Question

Nickel valency
Yttrium valency and
Copper valency

Answer 1

Answer:

Group 5 elements, however, have 5 valence electrons and will tend to take 3 electrons and so have a valency of -3. Group 6 elements, have 6 valence electrons and will tend to take 2 electrons and have a valency of -2. Group 7 elements have 7 valence electrons and will tend to take 1 electron and have a valency of -1.

Explanation:

Valency of First 30 Elements

Element Atomic Number Valency

Valency of Cobalt 27 3, 2

Valency of Nickel 28 2

Valency of Copper (Cu) 29 2, 1

Valency of Zinc 30 2

Answer 2

Answer:

The first answer is right