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8 Chemistry Revision

TermDefinition
chemical reaction new substances formed
physical reaction no new substances formed
chemical reaction indicators release of light or sound
physical reaction examples rolling dough
chemical reaction examples boiling an egg
atom smallest particle of an element
molecule a group of atoms bonded together
mixture a combination of substances that can be physically separated
chemical bond the force that holds two atoms together
reactants starting materials in a chemical reaction
products ending materials in a chemical reaction
electron charge negative
neutron charge neutral
proton charge positive
location of electrons shells
location of protons and neutrons nucleus
atomic number number of protons or electrons
atomic mass number of protons and neutrons
neutral atom an atom with no charge
element made up of one type of atom
compound made up of two or more different types of atoms
H Hydrogen
He Helium
Li Lithium
Be Beryllium
B Boron
C Carbon
N Nitrogen
O Oxygen
F Fluorine
Ne Neon
Na Sodium
Mg magnesium
Al Aluminum
Si Silicon
P Phosphorus
S Sulfur
Cl Chlorine
Ar Argon
K Potassium
Ca Calcium
physical property anything you can observe about an object using your five senses
volume the amount of space an object takes up
liquid to gas evaporation
the amount of matter in an object mass
gas to liquid condensation
solid to liquid melting
liquid to solid freezing
gas to solid deposition
solid to gas sublimation
examples of gasses hydrogen, oxygen, nitrogen
examples of solids wood, paper, metal
examples of liquids water, juice, cordial
density how tightly packed the particles are of a substance
melting point of ice zero degrees
boiling point of water one hundred degrees
density of water 1 gram per cm cubed
plasma the fourth state of matter
Created by: justineforrest
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