Mega bonding and naming

Match the following

• Iron(IV) oxide

• Fe₂O

• Iron(II) oxide

• FeO

• Iron(VI) oxide

• FeO₃

• Iron(I) oxide

• FeO₂

• incorrect formula

• Fe₂O₂

Answer explanation

find the charges, criss cross, and reduce if you can!

Iron(II) oxide = FeO -

Iron(IV) oxide = FeO₂

the incorrect formula is Fe₂O₂ because it should be reduced

Reorder the following from weakest bonds to strongest bonds

• triple

• single

• double

Answer explanation

triple bonds are the strongest because they are the hardest to break.

carbon rings are also very strong and hard to break. If you see a carbon ring, use the prefix cycle.

Tags

NGSS.HS-PS1-2

Reorder the following from least to greatest

• VII

• I

• IV

• VI

Answer explanation

I is 1

IV is four

VI is six

the biggest roman numeral used in chemistry is 7 (VII)

Reorder the following from least number of bond to most number of bonds.

You may want to draw a picture

• N₂

• S₂

• F₂

• xenon

Answer explanation

noble gases make no bonds so will have the least

F (and H) only has one free electron to share and will make one bond.

N has three free electrons and can make a triple bond

circle the hydrogen bonds

Answer explanation

Hydrogen bonds are the dotted lines between the hydrogen of one molecule and the Nitrogen-Oxygen-Fluorine of another molecule.

See the pic for the key.

Reorder the following from least reactive to most reactive

• butane

• butyne

• butene

Answer explanation

single bonds are the most reactive because they are the easiest to break.

triple bonds are the least reactive because they are the most difficult to break

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Match the following organic structures.

• ethene

• 
• ethanol

• 
• ethanal

• 
• ethane

• 
• ethanoic acid

• 

Answer explanation

Review pages 9 and 10.

Eth tells you there are 2 carbons

ane and ene indicate a single or double bond.

OL - means there is an alcohol functional group

AL is for aldehyde

-noic acid is for a carboxylic acid

Match the following

• Cobalt(VI) sulfate

• none

• Cobalt(II) sulfide

• Co(SO₄)₃

• calcium sulfate

• CaS

• calcium sulfide

• CaSO₄

• Cobalt(III) sulfate

• CoS

Answer explanation

CaS - Calcium does not need a roman numeral

CaSO_{4 -} Calcium does not need a roman numeral and SO4 is sulfate

Cobalt(II) sulfide - Cobalt is Co and the +2 is canceled out or reduced by the -2 of sulfur

Cobalt(VI) sulfate - Cobalt is Co with a +6, criss cross that with the -2 and reduce.

Cobalt(III) sulfate - Cobalt is Co with a +3, criss cross that with the -2

What is the correct name of NCl₃?

• Nickel(III) oxide

• nitrogen chloride

• nitrogen trichloride

• nickel chloride

• trinitrogen monochloride

Answer explanation

nitrogen and chlorine are both negative nonmetals - so you would name it with prefixes.

You do not have to use mono on the first element in a covalent bond.

Why do we use roman numerals????

• to be tricky

• bc some metals have multiple possible charges

• bc some metals do not follow good patterns

• bc we know the charges

• bc the Romans told us to