atom
smallest piece of an element that still has the properties of that element. It has a nucleus and electrons.
nucleus
Has protons and neutrons surrounded by electrons; central part of an atom.
element
Substance that is made up of the same atom
matter
This makes up everything in the universe. It as mass, takes up space and made up of atoms.
compound
This can be made when different atoms combine.
Periodic Table
A chart to organize elements
chemical sysmbol
Abbreviations for elements, molecules, and compounds.
density
describes how tightly the particles of matter are packed together. To find the density of something, divide its mass by its volume.
molecule
atoms stick together in a group
condenses
gas changes to a liquid
chemical change
matter changes into a different kind of matter.
Three states of matter
solid, liquid, gas
physical change
matter changes from one state to another state