Atomic Number

The Atomic number is known as the _______

• Number of electrons in an atom

• Number of Protons in an atom

• Number of neutrons in an atom

• Number of Protons and electrons in an atom

What is atomic number ?

• Number of Protons

• Number of Electrons

• Number of Protons and Electrons

• Number of Protons and Neutrons

Atomic Number is denoted by the symbol

• L

• A

• M

• Z

What is the number of protons in Magnesium atom ?

• 12

• 24

• 23

• 8

Tags

NGSS.MS-PS1-1

The atomic number is equal to the number of __ in an atom.

• protons

• neutrons

• electrons

• protons + neutrons

Tags

NGSS.MS-PS1-1

Identify the parts of the periodic table element shown.

a

b

c

d

Mass Number

Element Symbol

Atomic Number

Average Atomic Mass

Element Name

Isotope Number

Tags

NGSS.MS-PS1-1

What is the atomic number of this atom?

• 2

• 4

• 6

• none of the above

Tags

NGSS.MS-PS1-1

_____________ tells us the number of protons in an atom of a certain element?

• Atomic weight

• Atomic number

• Neutron number

• Electron number

Tags

NGSS.MS-PS1-1

The number 16 for the atomic element sulfur is the

• ionic number

• isotope

• atomic mass

• atomic number

Tags

NGSS.MS-PS1-1

Drag the correct term over the question mark.

c

Atomic Number

Identity Number

Periodic Number

Mass Number