Science Crossword

The smallest particle of a substance that still has the properties of that substance
Anything that has mass and takes up space
A force that holds two atoms together
A negatively charged particle found outside the nucleus of an atom
The smallest unit of an element that retains the properties of that element
Positively charged particle located in the nucleus of an atom
One or two letter code that represents an element
The number of protons in the nucleus of one atom of an element
The average mass of one atom of an element ;determined by the number of protons and neutrons
Substances that are the building blocks of all matter and made up of only one type of atom
A substance in which two or more elements are chemically joined in a set ratio
A shorthand way to represent compound
Sub-Atomic particle with a neutral charge that is located in the nucleus
The study of matter and its properties
This is a Lunar phase