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Chemistry Review

TermDefinition
reactants What you start with in a chemical reaction found before the arrow
products What you end with in a chemical reaction found after the arrow
Chemical Change making a new substance by creating or breaking chemical bonds
Physical Change changes to the size, shape, or phase of matter but no new substance is created
Groups Vertical columns on the periodic table
Periods horizontal rows on the periodic table
Metal elements on the left of the periodic table that are malleable, have luster, and are good conductors
Non-metal elements on the right of the periodic table that are brittle, do not have luster, and are poor conductors
Malleable the ability of a substance to be molded or bent
Brittle when a substance shatters or breaks into many pieces
Luster when an object is shiny and relfective
Metalloid an element that has some properties of both metals and non-metals
Conserve / Conservation stays the same
Coefficient Large number in front of a chemical formula, tells you how many molecules there are of a certain compound
Subscript small number right after an element, tells you how many atoms of that element are in a compound
Endothermic a chemical reaction where heat is absorbed
Exothermic a chemical reaction where heat is released
Atom smallest unit of a certain element
Element found on the periodic table, a pure substance made of only one type of atom
Compound a substance in which atoms of multiple different elements are chemically bonded together
Law of conservation of matter matter cannot be created or destroyed
Created by: user-2018914
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