Arsenic, with an electron configuration of 1s22s22p63s23p64s23d104p3, has a total of three electrons in its valence shell. true false

The answer is false.

Explanation:

Hello! The answer is false.

To see which are the electrons in the valence layer we see the last level that in this case is 4. In the last level we have 4s2 4p3, it means that we have two electrons in the sub-level s and three electrons in the sub-level p. We add the amount of electrons in the last level and two + three = five.

Then the answer is false.

particle   p is an electron and particle q is a neutron