Question #c796f

1 Answer
May 1, 2017

Answer:

10

Explanation:

Element 13 with 13 protons is Aluminum. To become stable Al will lose its three valance or outmost electrons. leaving the atom with a +3 charge

Aluminum starts with 13 protons and 13 electrons. Its electron configuration is # 1s^2 2s^2 2p^6 3s^2 3p^1#

When Aluminum loses its third level electrons # 3s^2 3o^1# it i left with the electron configuration of Neon # 1s^2 2s^2 2p^6# which is stable. This configuration has 10 electrons.

Another way to solve the problems is by subtraction. Aluminum starts with 13 electrons and loses 3 electrons.

# 13-3 = 10#

Aluminum as a # 3+# ion will have 10 remaining electrons.