Atomic Structure Practice 2020

Identify the element pictured in the diagram.

• Helium

• Oxygen

• Sodium

• Phosphorous

Tags

NGSS.MS-PS1-1

Identify the element in the diagram. The blue dots represent protons.

• Beryllium

• Boron

• Barium

• Bromine

Tags

NGSS.MS-PS1-1

An atom has 10 protons, 15 neutrons and 10 electrons what is it's atomic mass?

• 20

• 10

• 5

• 25

Answer explanation

Atomic mass = protons + neutrons

The negatively charged particles in an atom are: 

• protons
• neutrons
• electrons

The 2 main parts of an atom are: 

• nucleus & electron cloud
• nucleus & protons
• protons & electrons
• neutrons & electron cloud

What is the atomic number of the element shown? 

• 19
• 39
• 20

Tags

NGSS.HS-PS1-1

What is the atomic mass of the element shown? 

• 37
• 85
• 86
• 48

Tags

NGSS.MS-PS1-1

How many neutrons are in an atom of nitrogen?

• 7

• 14

• 8

• 9

Tags

NGSS.MS-PS1-1

How many protons are in EVERY atom of the element pictured in the diagram?

• 21

• 45

• 44

• 24

Tags

NGSS.MS-PS1-1

The atomic mass of an atom equals _ + _

• protons + neutrons
• protons + electrons
• neutrons + electrons
• nucleus + electron cloud