The basic building block of matter is an ________.

element

A chemical combination of two or more elements into a single substance is called a

________.

compound

The smallest unit of an element that still has properties of the element is an _____________.

atom

A ______ is a particle with a positive charge in the nucleus of an atom.

proton

A ______ is an uncharged particle in the nucleus of an atom.

neutron

An______ is a particle with a negative charge moving around the nucleus of an atom

electron

The dense center part of an atom is called the _______.

nucleus

A particle that contains more than one atom joined together is a ________.

molecule