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Module 1-2

QuestionAnswer
element a pure substance that cannot be broken down into any simpler substance (oxygen)
molecule a particle that contains more than one atom joined together
molecule example water is made of hydrogen and oxygen
compound a substance that is formed by the chemical combination of two or more elements (salt)
physical change change in appearance, state and volume
elements are organized by atomic mass
why is called the periodic table? the properties of the elements repeat in cycles
proton positively charged particles in the nucleus
neutron particles without charges in the nucleus
electron negatively charged particles that circle the outside of an atom
nucleus the center of an atom made of proton and neutrons
physical properties odor, color, density, mass, texture and appearance
Created by: jkimball
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