5.3-4 covalent compounds and bonds

Question 1

covalent bond

Answer 1

holds atoms together in a molecular compound by sharing electrons

Question 2

molecule

Answer 2

neutral group of atoms joined by covalent bond

Question 3

diatomic molecule

Answer 3

molecule made of 2 atoms

Question 4

molecular compound

Answer 4

compound composed of molecules

Question 5

molecular compound properties

Answer 5

-lower melting and boiling points than ionic compounds
-soft solids, liquids, or gases at toom temp
-not conductors of electricity

Question 6

molecular formulas

Answer 6

shows how many atoms of an element a molecule contains
-indicated the number of atoms in a molecule
-doesn’t give structure

Question 7

elements that exist only as compounds

Answer 7

HON Hal:
H2
O2
N2
F2
Cl2
Br2
I2

Question 8

structural formula

Answer 8

shows arrangement of covalently bonded atoms

Question 9

unshared pair

Answer 9

pair of electrons not shared between atoms

Question 10

double covalent bond

Answer 10

bond formed by sharing two pairs of electrons

Question 11

triple covalent bond

Answer 11

bond formed by sharing three pairs of electrons

Question 12

coordinate covalent bond

Answer 12

covalent bond where one atom contributes both bonding electrons to the covalent bond

Question 13

polyatomic ion

Answer 13

tightly bound group of atoms that has a charge and behaves as a unit

Question 14

how can you tell which atom is the central atom in a lewis structure?

Answer 14

the one with the most unpaired electrons or the atom with the LOWEST ELECTRONEGATIVITY
-hydrogen and halogens cannot be central

Question 15

what is irregular about oxygen in lewis structures?

Answer 15

-can only form up to two bonds
-generally doesn’t bond with itself