The atomic symbols and numbers used to abbreviate the name of a compound is called ____

Process that joins together different types of atoms is called ______

The space that represents the average distance that electrons are from the nucleus is called a _______

A column on the periodic table of the elements is called a ________

Protons and neutrons are found in the ________

_______________ a compound breaks apart into two or more simpler compounds

The study of matter is ___ what it is made of, what its usual characteristics are, how it reacts to other matter is called _____

An atom that has gained of lost electrons is called

The three mian parts of an atom are __________

The sum of the number of protons and neutrons results in an atom's approximate atomic ______

The ________________ of an atom is based on the number of protons in the nucleus.

The _____________ classifies elements in categories showing which elements possess siimilar characteristics and react similarly with other elements.