What is an atomic number?

• The sum of protons and neutrons in an atom.
• The sum of protons and electrons in an atom.
• The number of protons in an atom of a specific element.
• The number of neutrons in a specific element.

The number of neutrons equals...

• Atomic number - protons

• Protons - neutrons

• Electrons - protons

• mass number - atomic number

Tags

NGSS.MS-PS1-1

The atoms of any given element ____ have the same number of protons.

• sometimes
• always
• never

Which number shows the atomic number?

• 2

• 4.0026

• 4

• HE

Tags

NGSS.MS-PS1-1

Which number represents the atomic mass?

• HE

• 4.0026

• 2

• 4

Tags

NGSS.MS-PS1-1

Atoms that have a different amount of electrons than protons

• covalent bonds

• isotopes

• ionic bonds

• ions

Tags

NGSS.MS-PS1-1

How many Neutrons are in Neon

• 10

• 21

• 20

• 30

Tags

NGSS.MS-PS1-1

How many protons are in Neon

• 10

• 20

• 21

• 30

Tags

NGSS.MS-PS1-1

How many electrons are in Potassium

• 19

• 39

• 20

• 58

Tags

NGSS.MS-PS1-1

If an atom loses electrons, the charge will be positive.

• true

• false

Tags

NGSS.HS-PS1-2