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Chemistry Extra Credit

Horizontales
Positive subatomic particle
Substance that contains two or more elements CHEMICALLY combined
Has definite shape AND volume
Big enough to be seen with the naked eye
Negatively charged subatomic particle
Reaction where one element replaces another
Smallest particle of an element that retains its identity
Well-tested explanation
Only set of conditions where a substance can exist as solid, liquid, and gas
Molecule consisting of two atoms
Type of reaction that involves explosions or fire
Mixture in which the composition is not uniform
Subatomic particle with no mass
System of measurements we use in chemistry
Verticales
Amount of space occupied by an object
Solid that forms and settles out of two liquids
Solid that has no internal structure. Ex: rubber, plastic, glass
State of matter with the highest kinetic energy
First to discover atoms
Chemistry that involves living things
Atomic Number 8
Rule that says you need 8 valence electrons to be stable
Found in the outer shell of an atom
Substance present at the beginning of a chemical reaction
These are stable elements on the Periodic Table
Type of pressure that measured by the force exerted by a gas above a liquid
Has mass, takes up space
Possible explanation for an observation
Physical blend of two or more substances
Chemistry that involves carbon