Question

find electronic configuration and valence of (atomic number 17)element​

Answer 1

Answer:

Explanation: If the atomic number is 17, there must be 17 protons and 17 electrons. Starting from the lowest level, we add electrons to each higher level until we have reached 17 electrons. The electron configuration becomes 1s22s22p63s23p5

Answer 2

Answer: 1s2 2s2 2p6 3s2 3p5 and it is chlorine valence electrons are 7

Explanation: