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Chem Interaction C 1

Chemical Interaction Chapter One Section 1

Matter anything that has mass and occupies space
Element a substance that can't be broken down into any other substances by chemical or physical means
Compound a substance made of 2 or more elements chemically combined in a specific ratio or proportion
Mixture 2 or more substances that are mixed together but not chemically combined
Atom the smallest particle of an element
Scientific theory a well-tested idea that explains and connects a wide range of observations
Model physical, mental , visual, and other representations of an idea to help people understand a concept that they can't observe directly
Electrons negatively charged particles that move around outside the nucleus of an atom
Nucleus the central core of an atom, containing protons and neutrons
Protons small, positively charged particles that are found in the nucleus of an atom
Energy level the specific amount of energy an electron has
Neutrons small , uncharged particles that are found in the nucleus of an atom
Created by: tkucia