What is atmosphere and what is troposphere?

atmosphere is a gas that circles around our planet or it could be any other planet that the atmosphere circles around. troposphere is in the lowest area in the atmosphere. it's where all the clouds form too!

i provided a picture for better understanding :) hope this helps! ❤ from peachimin

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