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Chapter 3

1
2
3
4
5
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7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Across
3
Attraction of two atoms for a shared pair of electrons that holds the atoms together
5
Has little mass and a negative charge
6
Tiny particle that has mass and a positive charge
10
Particle with approximately the same mass as a proton and is electrically neutral
12
Anything that has volume and mass
13
Sum of protons and neutrons
14
Particles of a solid that are arranged in regular geometric patterns
16
Substance that can't be broken down into simpler substances by physical or chemical means
17
Number of protons in an atom's nucleus
18
Gas is cooled to the boiling point becoming a liquid
21
Composed of two or more atoms held together by covalent bonds
22
Solution containing a substance that produces hydrogen ions in water
23
Substance that produces hydroxide ions in water
Down
1
Change from a liquid to a gas at temperatures below the boiling point
2
Attractive force between two ions of opposite charge
3
Change of one or more substances into other substances
4
An atom that gains or loses an electron that has a net electrical charge
6
Hot, highly ionized, electrically conducting gases
7
Slow change of state from a solid to a gas without an intermediate liquid state
8
Atoms of the same element that have different mass numbers
9
Allows metals to conduct electricity because the electrons can move freely throughout the entire solid metal
11
Force that holds together the elements in a compound
15
Homogeneous mixture whose components can't be distinguished and can be classified as liquid, gaseous, solid, or a combination
18
Substance that is composed of atoms of two or more different elements that are chemically combined
19
Made up of protons and neutrons
20
Solid that consists of densely packed atoms arranged randomly