How many valence electrons do atoms like to have?

Which group of atoms
already have that number?

What atom is an exception to
that rule and why is it an
exception?

If atoms do not have that
special number of valence
electrons, what will they do?

Answer 1: 8

Answer 2: Protons and Valence Electrons

Answer 3: Hydrogen

Answer 4: When atoms have fewer than eight electrons, they tend to react and form more stable compounds.

Explanation:

.Atoms lose, gain, or share electrons to have a full valence shell of eight electrons. Hydrogen although is an exeption exception because it can hold a maximum of two electrons in its valence level. They may react and form more stable compounds.

the doppler effect is used by weather forecasters to measure 

moving clouds