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Chemistry Unit 1

The smallest particle into which an element can be divided and still be the same element, The basic unit of a chemical element Atoms
A group of atoms that are held together by bonds; they act as a single unit. Molecules
Matter is made up of what? Particles
Contains only one kind of particle. Pure Substances
A tool used to measure temperature. Thermometer
The flow of thermal energy from warmer objects to cooler objects. Heat
States of Matter Solids, Liquids, Gases
equal to the number of protons; increases as you move left to right on the periodic table, determines chemical properties of an element Atomic Number
the average mass of all the isotopes of an element, approx equal to the number of protons and neutrons within an atom Atomic Mass
This change involves the same matter but in a different form or appearance. Physical Reactions / Changes
This changes into a new substance (cannot be changed back to original substance) Chemical Reactions / Changes
The mass of reactants must equal the mass of the products. Conservation of Matter
Energy cannot be created or destroyed Conservation of Energy
Created by: emmaraepetty