Write the electron configuration for a chlorine atom. calculate the total number of electrons in each energy level and state which energy levels are not full. i know that the electron configuration for a chlorine atom is [ne] 3s2 3p5 but i need figuring out the total number of electrons in each energy level and state. : )

First , second energy levels are complete where as third energy level is not.

Explanation:

Electronic configuration is defined as distribution of electrons of an element in its various energy levels.

Chlorine has an atomic number of 17. Which means that its has 17 proton and 17 electrons.

Electronic configuration of chlorine is given as:

Energy level which fully filled are : 1s , 2s , 2p

Energy level which are not fully filled are : 3s, 3p

First , second energy levels are complete where as third energy level is not.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.