Unit 1 - Atoms

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

Tags

NGSS.MS-PS1-1

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

• negatrons 
• electrons 
• neutrons 
• protons 

True or False? Neutrons have a negative charge

• True
• False

Tags

NGSS.HS-PS1-8

What is the atomic number for an element with three protons?

• 2
• 1
• 3
• 6

A particle that moves around the nucleus is a(n)...

• Proton
• Neutron
• Electron
• Quark

Tags

NGSS.MS-PS1-1

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

What does the 1.00794 stand for?

• Hydrogen
• atomic number
• atomic mass
• atomic explosion

Tags

NGSS.MS-PS1-1

What is an atom? 

• The most basic unit of matter. It is made up of a proton, electron, neutron, and a nucleus. 
• A substance that can't be broken down into any other substance 
• 2 or more chemically combined substances 
• a small particle that contains only a proton and neutron 

What is the charge of a proton? 

• Negative 
• Neutral 
• Positive 
• 2

What is the charge of an electron 

• positive 
• negative 
• 1
• neutral