Molecules and atom
Basic Concepts of Matter
anything that occupies space and has mass
Matter，Element，Compound
Structure of an Atom
The smallest unit of an element
Molecule Formation
Atoms are held together by chemical bonds
Two or more atoms bonded together
Behavior of Matter
How matter behaves, changes, or reacts under different conditions
Solid, liquid, gas
water
two hydrogen atoms + one oxygen atom
Chemical Reactions and Interactions
Changes between substances to form new substances
Force that holds atoms together