PS Atoms & Bohr Models

Atomic number tells us the number of

• protons

• neutrons

• protons & neutrons

Mass number tells us the number of

• protons

• neutrons

• protons & neutrons

Neutrons are found in the

• nucleus

• electron cloud

Protons are found in the

• nucleus

• electron cloud

as long as it is an ATOM, the number of electrons

• equals # of neutrons

• equals the mass number

• equals # of protons

Tags

NGSS.MS-PS1-1

The number of neutrons is equal to

• mass number

• atomic number

• mass number + atomic number

• mass number - atomic number

On a Bohr model of an atom, the first ring can hold ___ electrons and any ring past that can hold ___ electrons

• 2,4

• 2,2

• 2,8

• 8,2

The section labeled D is known as the?

(click image to enlarge)

• Proton

• Neutron

• Nucleus

• Electron

Tags

NGSS.MS-PS1-1

The alkali metals are...

• Group 1

• Groups 3-12

• Group 17

The Noble Gases are...

• Group 1

• Group 17

• Group 18