Question

How many electrons are lost or gained in forming each ion? a. Ba2+ b. As3- c. Cu2+

Answer 1

Answer:

See below

Explanation:

Part a)

Ba⁺²

Since it has a positive charge, this means it has lost electrons and that too 2 electrons. It has lost 2 electrons.

Part b)

As⁻³

Since it has a negative charge, it has gained electrons and that too 3 electrons. It has gained 3 electrons.

Part c)

Cu⁺²

It has a positive charge, so it has lost electrons and that too 2 electrons. It has lost 2 electrons.

$\rule[225]{225}{2}$

Answer 2

B. As3 because potassium atoms do this to form ions with the same electron configuration as the noble gas argon