Unit 1 Test Review

The center of an atom is known as the

• nucleus

• electron cloud

• neutron cloud

• mass circle

Tags

NGSS.HS-PS1-8

Which subatomic particle has a positive (+) charge?

• Neutron
• Proton
• Electron

True or False - Protons and Neutrons have about the same mass.

• True - They have about the same mass
• False - They do not have about the same mass

Which subatomic particle has a negative (-) charge?

• Proton
• Electron
• Neutron

Which letter represents a proton?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1

Which letter represents a neutron?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1

Which letter represents an electron?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1

What is the mass number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

An atom with atomic number 6 would have how many protons?

• 6

• 12

• 3

• cannot be determined

If an atom has 10 electrons, how many protons does it have?

• 0
• 1
• 10
• 5