atomic structure

What are the three subatomic particles?

• element,atom, compound
• atomic number,mass number,isotopes
• protons,electrons, neutrons
• mass,charge,location

What has a positive charge and is found in the nucleus of an atom?

• proton
• electron 
• neutron
• isotopes

Electrons have a charge of -1

• true
• false 

What equals the number of protons in an atom?

• atomic number
• mass number

The mass number is the sum of ______ and ______ in the nucleus of that atom.

• solids and liquids
• electrons and isotopes
• protons and neutrons
• elements and compounds