Chapter 5 Molecules and Compounds

Question 1

Scientist who formally stated the idea that elements combine in fixed proportion to form compounds.

Answer 1

Joseph Proust (1754-1826)

Question 2

Law that states “All samples of a given compound have the same proportions of their constituent elements”

Answer 2

Law of Constant Composition.

Question 3

When writing formulas, metals are placed _____ nonmetals.

Answer 3

before

Question 4

Nonmetals are placed _____ metals in formulas.

Answer 4

After

Question 5

An ion composed of a group of atoms with an overall charge that act as a unit.

Answer 5

Polyatomic

Question 6

Ionic charge of Flourine

Answer 6

-1 Nonmetal

Question 7

Ionic charge of Chlorine

Answer 7

-1 Nonmetal

Question 8

Ionic charge of Bromine

Answer 8

-1 Nonmetal

Question 9

Ionic charge of Iodine

Answer 9

-1 Nonmetal

Question 10

Ionic charge of Oxygen

Answer 10

-2 Nonmetal

Question 11

Ionic charge of Sulfer

Answer 11

-2 Nonmetal

Question 12

Ionic charge of Nitrogen

Answer 12

-3 Nonmetal

Question 13

The simplest whole number ratio of atoms of each element in a compound.

Answer 13

empirical formula

Question 14

The actual number of atoms of each element in a molecule of a compound.

Answer 14

Molecular formula

Question 15

A two dimensional representation of molecules that not only shows the number and type of atoms but also how the atoms are bonded together.

Answer 15

Structural formula

Question 16

Three dimensional representations of molecules

Answer 16

molecular models

Question 17

An element that exists in nature with single atoms as the basic unit.

Answer 17

Atomic element

Question 18

Element that usually exists as diatomic molecules (2 atoms of that element bonded together) as their basic units.

Answer 18

Molecular element

Question 19

Two atoms of the same element bonded together

Answer 19

Diatomic molecules

Question 20

A compound formed from two or more non-metals

Answer 20

molecular compound

Question 21

7 Elements that occur as Diatomic Molecules

Answer 21

Hydrogen, Nitrogen, Oxygen, and 4 Halogens- Fluorine, Chlorine, Bromine, Iodine

Question 22

A compound formed between a metal and one or more nonmetals

Answer 22

Ionic Compound

Question 23

The basic unit of ionic compounds; the smallest electrically neutral collection of cations and anions that compose the compound.

Answer 23

Formula Unit