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Physical & Chemical Changes


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1.mixture of particles of one substance that are mixed in a liquid, but are not dissolved and can be separated from the liquid
3.liquid in which another substance (solute) is being dissolved
8.mass of an average atom of an element calculated by adding the number of protons and neutrons in the nucleus (2 Words)
10.to make the particles of a substance equally spread within a liquid
12.force that allows elements to share, lose or gain electrons to form a compound or molecule (2 Words)
14.combination of two or more substances in such a way they are not chemically combined
16.substance that results when two or more elements join together chemically in definite amounts
19.substance formed when an acid and a base combine
21.liquid with only a small amount of solute dissolved in it
22.substance made of just one type of atom; cannot be broken down into a simpler substance by ordinary means
24.statement that matter can be changed from one form to another, but cannot be created nor destroyed (5 Words)
27.change in a substance, such as its shape or size, where the matter of which it is made remains unchanged (2 Words)
28.the smallest component (particle) of a compound
29.negatively charged particle that orbits the nucleus of an atom
30.one step in, or part of, a chemical change between substances (2 Words)
31.liquid with a relatively large amount of solute dissolved in it
32.to make the number of atoms of the reactants equal to the number of atoms of the product in a chemical equation
33.any chemical that changes color in an acid or base
34.change in a substance or substances that regroups the atoms to make a new substance with different chemical properties (2 Words)
2.arrangement of all the known elements in a table in order of their atomic numbers (5 Words)
4.positively charged core of an atom, containing protons and neutrons
5.quantitative measure of the relative acidic or basic character of a solution; pH lower than 7 is acidic; 7 is neutral; greater than 7 is basic (2 Words)
6.substance that gives up negatively charged OH particles; turns red litmus paper blue
7.uniform mixture of particles too small to be seen, made of one or more substances dissolved in a liquid
9.number of protons in the nucleus of an atom (2 Words)
11.path of an electron around the nucleus of an atom that corresponds to a certain amount of energy of the electron (2 Words)
13.substance that gives up charged particles of hydrogen; turns blue litmus paper red
15.substance being dissolved in a liquid (solvent)
17.neutral particle in the nucleus of an atom
18.electron in the outer energy level of an atom (2 Words)
20.set of symbols identifying the substances involved before and after a chemical reaction (2 Words)
23.substance that forms as a result of a chemical reaction
25.positively charged particle in the nucleus of an atom
26.substance that interacts chemically with another substance during a chemical reaction

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