The nucleus of a cell The smallest piece of an element Just big enough to see with your eye A distant star
Electrons and molecules Electrons and neutrons Electrons and protons Protons and neutrons
A negative charge A positive charge A big voltage A small resistance
Electrons and neutrons Protons and neutrons Neutrons and volts Electrons and protons
The number of protons The number of neutrons The number of protons + electrons The number of protons + neutrons
Allotropes Polymers Monomers Isotopes
8, 8, 8 8, 2, 2 2, 8, 8 2, 2, 2