Question

Which of the following is a metal with five valence electrons that is not synthetic

Answer 1

Arsenic

How?

Arsenic has Z=33

EC given by

`\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^23d^104p^3`

4th shell has 2 electrons in s orbital and 3 in p orbital .

• Valence electrons=2+3=5