Chemistry #2 CFA

The atomic number ALWAYS indicates the number of .....

• electron shells

• protons

• neutrons

• nucleons

The electron number in a neutral atom is found by.......

• looking at the number of protons

• looking at the number of neutrons

• mass number

• atomic mass

Neutrons are found by......

• looking at the number of protons

• looking at the number of electrons

• mass number minus protons

• electrons minus atomic mass

The mass number is found by......

• protons + electrons

• electrons + neutrons

• neutrons + protons

• protons + nucleons

Which subatomic particle's mass is 1 amu? (select all that apply)

• neutrons

• electrons

• protons

• valence electrons

The number of electrons that fit in the first four shells are....

• 2, 8, 16, 32

• 2, 8, 18, 32

• 2, 6, 18, 32

• 2, 6, 16, 32

The atomic mass for phosphorus is 30.9737. What is the mass number?

• 30

• 20

• 31

• 29

These two subatomic particles are found in the nucleus of an atom.....

• protons & electrons

• electrons & neutrons

• protons & neutrons

• valence electrons & protons

This is an atom of what element?

• Beryllium

• Lithium

• Boron

• Helium

Which picture is the correct Lewis Dot diagram for Carbon?

• B

• C

• D

• E

• F