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Unit 1 & 2 Science


Matter Anything that takes up space and has mass
Law of Conservation of Matter Matter cannot be created or destroyed, only transformed from one state to another
Density How tightly packed the particles in a substance are
Mass The amount of matter in an object
Volume How much space an object takes up
Atoms Basic building blocks of matter
Proton subatomic particle found in nucleus of atom, positive charge
Neutron subatomic particle found in nucleus of atom, no charge
Electron subatomic particle in orbit around atom , negative charge
Atomic Number number of protons in nucleus of atom
Element Pure substance made up of only one kind of atom
Compound Two or more elements chemically combined
Mixture Two or more substances not chemically combined- can be separated
Metal Has luster, is malleable and conductive
Non metal No luster, brittle, non conductive
Metalloid Has qualities of metals and non metals, semi-conductors
Luster shiny- reflects light
Malleable Can be reshaped with out breaking
Conductivity Easily allows heat or electricity to flow through
Ductility ability to be stretched into wire
State of Matter solid liquid or gas
Physical Change change to the shape or state of matter, usually can be undone, no molecular change
Chemical Change change to the molecules of a substance, usually cannot be undone, a new substance is formed
Hypothesis an educated guess
Chemical Symbol a 1,2,3 letter abbreviation of an element's name
D=M/V equation for density of an object
Created by: science183