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.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8