Section 2.6 Molecules & Molecular Compounds

Question 1

A molecule made up of two atoms is called

a

Answer 1

Diatomic molecule

Question 2

H2, O2, N2, F2, Cl2, Br2, and I2

CL I F H Br O N

Answer 2

Comon diatomic elements

Question 3

Compounds composed of molecules contain more than one type of atom and are
called

Answer 3

Molecular Compounds

Question 4

Chemical formulas that indicate the actual numbers of atoms in a molecule are called

Answer 4

Molecular Formulas

Question 5

Chemical formulas that give only the relative number of atoms of each type in a molecule
are called

Answer 5

empirical formulas

Question 6

Whenever we know the molecular formula of a compound, we can determine its empirical formula. The converse is not true, however. If we know the empirical formula of a substance, we cannot determine its molecular formula unless we have more information

Answer 6

FYI

Question 7

shows which atoms are attached to which

Answer 7

Structural Formula

Question 8

The atoms are represented by their chemical symbols, and lines are used to represent the bonds that hold the atoms together. Does not depict the actual geometry of the molecule, that is, the actual angles at which atoms are joined. Can be written as a perspective drawing.

Answer 8

Structural Formula

Question 9

show atoms as spheres and bonds as sticks. This type of model has the advantage of accurately representing the angles at which the atoms are attached to one another in a molecule. Sometimes the chemical symbols of the elements are superimposed on the balls, but often the atoms are identified simply by color.

Answer 9

Ball-and-stick models

Question 10

depicts what a molecule would look like if the atoms were scaled up in size. These models show the relative sizes of the atoms, but the angles between atoms, which help define their molecular geometry, are often more dif-
ficult to see than in ball-and-stick models.

Answer 10

Space-filling model