Question

If an atom has 10 protons and electrons how many of the electrons will be valence electrons?

Answer 1

Answer:

8 of the electrons will be valence electrons

Explanation:

Answer 2

Answer:

8 valence electrons

Explanation:

We are given the atom has 10 electrons.

The first electron shell holds 2 electrons (maximum)

The second electron shell holds 8 electrons (maximum)

2+8=10

Therefore we would have 2 electrons in the first shell and 8 in the second.

Valence electrons are the outermost electron, and since the second shell is the outermost for the atom, it has 8 valence electrons.