Atoms Test Review

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

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

• negatrons 
• electrons 
• neutrons 
• protons 

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

• Proton
• Neutron
• Electron
• Quark

What does the 1.00794 stand for?

• mass number

• atomic number

• average atomic mass

• number of protons

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

If an atom has 12 protons, which of the following must it also have to be considered a neutral atom?

• 12 neutrons

• 12 electrons

• 12 protons

• 24 protons and neutrons

If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?

• 10
• 20
• 30