atoms

Where the subscript in H₂O

• H

• 2

• O

An oxygen atom has about 8 protons and 7 neutrons.

What is the atomic number?

• 9

• 15

• 7

• 8

All matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is at the center of every atom?

• an electron
• a compound
• a molecule
• a nucleus

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

The particles that are found in the nucleus of an atom are

• neutrons and electrons
• electrons only
• protons and neutrons
• protons and electrons

Tags

NGSS.HS-PS1-8

Where are electrons of an atom found?

• Nucleus
• Electron Cloud
• Some are in the nucleus and some in the electron cloud.
• They are moving everywhere.

Tags

NGSS.MS-PS1-1

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

Tags

NGSS.MS-PS1-1

Both elements and compounds are pure substances.

• Agree

• Disagree