1. Did the gas bubbles come from the water, or when the bath bomb is put in the water.

Dont listen to that other dude, its some fake scam thing.

Explanation:

Its a chemical reaction between H2O and the chemicals in bath bombs.

so basically the bubbles come from the chemical reaction between the water and bath bomb,

hope this helps! :)

6.4 cm (max) - 25 cm (min)

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