Molecules with bonds between their components will (fall apart) in water, releasing charged particles called ions.

Molecules with ionic bonds between their components will dissociate (fall apart) in water, releasing charged particles called ions.
When the number of protons and electrons are not equal, ion is formed. There are two types of ions, Cations and anions. Cations are the positively charged ions and when an atom gains electron, Cation is formed. Anions are negatively charged ions and when an atom loses electrons, anion is formed.

you didnt put any of the following

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