Chapter 7 Vocabulary

Question 1

alloy

Answer 1

a mixture composed of two of more elements, at least one of which is a metal

Question 2

chemical formula

Answer 2

shows the kinds and numbers of atoms in the smallest representative unit of a substance

Question 3

coordination number

Answer 3

the number of ions of opposite charge that surround each ion in a crystal

Question 4

electron dot structure

Answer 4

diagrams that show valence electrons as dots

Question 5

formula unit

Answer 5

the lowest whole-number ratio of ions in an ionic compound

Question 6

halide ion

Answer 6

a negative ion formed when a halogen atom gains an electron

Question 7

ionic bonds

Answer 7

formed when one or more electrons are transferred from one atom to another

Question 8

ionic compounds

Answer 8

compounds composed of cations and anions

Question 9

metallic bonds

Answer 9

consist of the attraction of the free-floating valence electrons for the positively charged metal ions

Question 10

octet rule

Answer 10

states that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons

Question 11

valence electron

Answer 11

the electrons in the outermost shell (main energy level) of an atom; these are the electrons involved in forming bonds