How do you calculate number of valence electrons in an arsenic atom?
Ground state, neutral arsenic atoms have five valence electrons.
Refer to the explanation.
For the representative elements, groups 1,2, and 13-18 (IA-VIIIA), the number of valence electrons in their atoms can be determined from their group number. For groups 1 and 2, the group number is the number of valence electrons. For groups 13-18, the number of valence electrons is 10 minus the group number. For the A groups, the group number is the number of valence electrons.
Arsenic is in group 15, so its atoms have 5 valence electrons.
We can also determine the number of valence electrons of the representative elements by determining their ground state electron configurations. The highest energy (outermost) s and p sublevels, also called the valence shell, contain the valence electrons.
So we can see that the electron configuration for arsenic has 5 electrons in the valence shell of the 4th energy level.
Well, in which Group of the the Periodic Table does arsenic lie?
And arsenic lies in the old
And so arsenic lies is the old