Introduction to Chemistry 2016

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when reading and writing chemical formulas, this is the small number after a chemical symbol that tells how many atoms of the element there are

this is created when two or more atoms chemically combine (the atoms can be of the same element, or they can be different

a solid that forms during a chemical reaction when two or more liquids are mixed

the amount of matter an object contains

Evidence of this is the formation of a gas

this state of matter has a definite shape and a definite volume; the particles are tightly packed in a fixed position

the energy of a substance heat, this increases as the temperature increases, causing the molecules to move faster

characteristics of substances that are used to describe and identify matter, such as size, shape, color, and ability to react to other chemicals