Atoms, Elements, and the Periodic Table

Substance whose smallest unit is made up of atoms of more than one element

Atomic mass number is the____________.

There are more than _____ naturally occurring known elements. 

Positively charged particles in a nucleus are called______________.

Positively charged, central part of an atom is called a(n)___________.

Mixtures that are the same throughout are_____________.

Elements are matter made up of_________.

 Law of Conservation of Matter: matter is neither _______ nor ________, but only changes form

Tiny, negatively charged particles with mass are called ___________.

Elements fall into general groups characterized by similar properties:

Two or more substances mixed together which don't make a new substance is called_____________.

The top number in the element's periodic table block is called_________.

What is matter?