Chemistry 51 Terms Chap 3

Front 1

Isotopes

Back 1

atoms that have the same atomic number, but different mass numbers (most elements have two or more naturally occurring isotopes that contribute to its average atomic mass).

Front 2

Molecule

Back 2

is the smallest uncharged individual unit of a compound formed by the union of two or more atoms

Front 3

Ion

Back 3

is a positively or negatively charged atom or group of atoms

Front 4

Anions

Back 4

negative ions that are formed by the gain of electrons. Cl + 1e- -> Cl-

Front 5

The smallest particle of an element than can exist

Back 5

atom

Front 6

Solid at room temp, high luster, good conductor of heat and electricity, malleable, ductile, high melting point, high density,hemogogenous

Back 6

Metals

Front 7

No luster, low melting point, poor conductor heat and electricity

Back 7

non metals

Front 8

Carbon, phosphorus, sulfur, iodine, selenium are?

Back 8

Non metals

Front 9

Have properties of both metels and non metals

Back 9

metalloids

Front 10

A distinct substance that contains two or more elements combined in definite proportion by mass

Back 10

compound

Front 11

2 CLASSES OF COMPOUNDS?

Back 11

1-MOLECULAR-composed of two or more elements
2-Ionic-ionic citation with positive charge and anions with negative charge

Front 12

Contain two atoms alike or different

Back 12

diatomic molecules

Front 13

Shows the symbols and the ratios of atoms for the elements is a chemical compound

Back 13

chemical formula

Front 14

A positively charged ion

Back 14

Cation

Front 15

Number that appears partially below the line and to the right of a symbol of an element

Back 15

Subscript