2.3 Naming Molecular compounds

Question 1

Molecular compounds = covalenently compounded compounds (2 non metals)

Question 2

Ionic compound = metal w/ non metal

Question 3

KNOW: nonmetal to the right of that stair case and hydrogen
* some of the metaloids (atoms around that stair case) are grouped in w/ non metals as well

Question 4

N2O4
* so we name these elements in the order they’re listed in the compound (in this case we would name nitrogen, then oxygen)

the second element takes on an ide ending for molecule compounds

So the compound above is Nitrogen Oxide
* however, these will need to use the prefixes below for the amount of each atom
* so it would be Dinitrogen Tetraoxide
* however we don’t like the vowel vowel sounds so we actaully just drop the last letter of the prefix if the first letter of the compound starts w/ a vowel
* Dinitrogen Tetroxide <– we dropped the A

Question 5

NOTE: we need to always make sure we can identify the correct compound (make sure we know its its molecular or ionic) then use the correct set of rules
* Dont use molecular rules for an ionic compound

Question 6

The vast majority of molecular compounds just have 1 of the first element. In this cas we don’t use the prefix mono

CO2 = Carbon Dioxide (i’m not sure why we keep the vowels together)

CO = Carbon monoxide
* if we have one of the second element we actually keep the mono

The real rule is when its unclear how many there could be than we add mono. So in the case above we couldnt write carbon oxide because there could be 2 oxygens or 1 oxygen attached to that carbon. Theres some exceptions where only one molecule can bind to that first one where we don’t use mono
* Im not going to worry about this exception right now - likely will not encounter this

Question 7

Answer 7

Chlorine Trioxide

First element doesnt get any suffix and if theres only 1 we don’t incliude mono

We add tri infront of oxygen because theres 3 and add the ide because its the second element

Question 8

Answer 8

Phosphorus Pentachloride

Penta = 5
ide = second one

Question 9

Answer 9

Dinitrogen monoxide

remember, the second name actually gets the mono prefix - even if theres just one. I missed this part

Question 10

Answer 10

N2O4

Question 11

Answer 11

remember to always make sure you’re naming a molecualr compound and not an ionic compound