STAAR 2021 Atoms and Periodic Table

Which two subatomic particles are found in the NUCLEUS of at atom?

• protons & nuetrons
• protons & electrons
• neutrons & electrons
• electrons & protons

The subatomic particle with a neutral charge is:

• protons
• electrons
• neutrons
• cloud

What type of subatomic particles are found in the cloud?

• neutrons
• electrons
• protons
• reactions

Which type of subatomic particles have the LEAST amount of mass?

• protons
• electrons
• neutrons
• nucleus

What gives an atom mass?

• Protons & electrons in the nucleus
• electrons in the cloud
• protons & neutrons in the nucleus
• Protons & electrons in the cloud

If an atom has 24 protons and 24 electrons, what is the atomic number of this element?

• 24
• 48
• 0
• 42

Tags

NGSS.MS-PS1-1

How many protons does this element have?

• 40
• 21
• 20
• 41

The number of protons is equal to 

• the atomic number
• the number of neutrons
• the energy levels
• the periodic table groups

Elements in the same ________ are more chemically similar.

• group
• period
• club
• table

Rows on the periodic table are called _____ while columns are called _____.

• groups, families
• groups, periods
• periods, groups
• families, groups