Atoms

Front

The smallest unit of an element is __________

Back

an atom

Front

What is the center of an atom called?

Back

nucleus

Front

What part of an atom has a positive charge?

Back

protons

Front

How many elements are there in the world?

Back

116

Front

What two things are found in the nucleus of an atom?

Back

protons and neutrons

Front

What have a negative charge?

Back

electrons

Front

What have a neutral charge (or no charge)?

Back

neutrons

Front

What part of the atom is the most dense, and where most of the mass is found?

Back

nucleus

Front

An atom is made up of mostly ___________________________

Back

empty space

Front

A substance that cannot be broken down into anything simpler is _____________________. Options: an element, a compound, atoms, matter

Back

an element