Lewis Structure Quiz

Question 1

types of formulas

Answer 1

molecular- tells the ratio of the elements in a compound (covalent compound)

empirical- tells the ratio of the elements in a compound (ionic mainly, also covalent)

structural formula- pictures of where all the atoms are; allow us to predict how molecules behave; includes Lewis structures

Question 2

special rules for oe-

Answer 2

Be = 2 oe-
H = 2 oe-
B = 6 oe-

Question 3

acids with oxygen

Answer 3

(prefix based on anion) + (suffix: if ate then ic, if ite then ous) acid

Question 4

acids without oxygen

Answer 4

(hydro) + (something I think based on cation) acid

Question 5

examples, give the chemical name:
H2SO4
H2S
H3PO4

Answer 5

sulfuric acid
hydrosulfuric acid
phosphoric acid

Question 6

examples, give the chemical name:
HF
HNO2
H3P

Answer 6

hydrofluoric acid
nitrous acid
hydrosulfuric acid

Question 7

prefixes for ionic bonds:
1
2
3
4
5
6
7
8
9
10

Answer 7

mono (only for O, only when it is the 2nd element)
di
tri
tetra
penta
hexa
hepta
octa
nona
deca

Question 8

naming ionic bonds

Answer 8

1st word = name of the 1st element

2nd word = name of teh 2nd element +ide

Question 9

the diatomic elements

Answer 9

H2
N2
O2
F2
Cl2
Br2
I2

Question 10

chemical exceptions

Answer 10

water = H2O
methane = CH4
ammonia = NH3

Question 11

how to find the charge of an atom in a compound

Answer 11

determine the # of e- that the atom of interest owns (1 per bond, 2 per lone pair)and plug into the equation:

charge on atom= ve - #owned when bonded

Question 12

vsepr

Answer 12

Valence Shell Electron Pair Repulsion:

the shapes of covalent molecules are determined by the repulsion of the bonding and lone pair e-

Question 13

resonance structures

Answer 13

the different valid Lewis structures that you can write for a compound where all of the atoms are in the same place (only e- and bonds can move); the true structure of a molecule is an average of the resonance structures