2.2 Molecular Elements and Compounds

Question 1

Molecular Elements

Answer 1

consist of molecules containing atoms of only one type of element.

Eg. S8 (s) Sulfur or ozone O3 (g).

Question 2

DIATOMIC:

Answer 2

made up of 2 atoms.

Eg. Nitrogen, N2 (g). [HOFBrINCl acronym]

Question 3

Molecular Compounds

Answer 3

made of molecules, each with the same arrangement of specific atoms (at least 2 different atoms)

Question 4

The structure and shape of molecular compounds
has a significant ______ on the _________ of
the compound

Answer 4

influence; properties

Question 5

properties of molecular substances

_____ melting and boiling points

Answer 5

Low

Question 6

properties of molecular compounds

Variety of _______

Answer 6

textures

Question 7

properties of molecular compounds

Some are flexible and others are _____

Answer 7

brittle

Question 8

properties of molecular compounds

Generally, molecular substances do not _______
readily in water

Answer 8

dissolve

Question 9

properties of molecular compounds

Do not ______ electricity, even when dissolved in
water because they do not consist of _______ ions

Answer 9

conduct; charged

Question 10

Covalent Bond:

Answer 10

The bond that results from the
sharing of a pair of electrons by two atoms.

Question 11

_____________ are available in the valence
(outer) shell to form a _____________ with another
atom.

Answer 11

Bonding electrons; covalent bond

Question 12

Bonding capacity:

Answer 12

The number of covalent bonds that an atom can form

Question 13

Lone Pair:

Answer 13

A pair of electrons that is not involved
in covalent bonding

Question 14

exceptions to the octet rule

Answer 14

some elements can form molecular compounds with an overfilled or underfilled valence shell.