How do you indicate the number of atoms in a covalent compound?
For example, I don't understand these:
NO3 -
Why is it 1(mono)?
PO4 3-
Why is it 3 (tri)?
IO3 -
Why is it 4 (tetra)?
MnO4 -
Why is it 7 (hepta)?
SO3 2-
Why is it 10 (deca)?
Please, PLEASE help!
I have a quiz on this tomorrow.
It was part of my summer homework so I didn't have any instructor teaching me, I was supposed to teach everything to myself but this was the one part I didn't get.
2007-08-20 12:53:42 · 3 answers · asked by sophesticatedsophia 1 in Science & Mathematics ➔ Chemistry
You are asking questions about different things. You have got them all mixed up.
NO3- has a (-) charge (mono), because the oxidation number of N is +5, of O -2, and so (+5) + (-6) = -1 ("mono")
P is oxidation number +5, O is -2, so (+5) + (-8) = -3 ("tri")
There is no tetra. In periodate, IO4-, the oxidation number of I is +7, O is -2, so (+7) + (-8) = -1
In permanganate, MnO4-, Mn is +7, O is -2,so (+7) + (-*) = -1
There is no deca. S is +4, O is -2, and (+4) + (-6) = -2
2007-08-20 13:44:37 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
The prefixes that you listed describe names of covalent bonds. However, as written your question involves polyatomic ions, with the names given below. Unfortunately, polyatomic ion names are things you have to memorize.
NO3 - is nitrate
PO4 3- is phosphate
IO3 - iodate
MnO4 - permanganate
SO3 2- sulfite
2007-08-20 21:29:15 · answer #2 · answered by Anonymous · 0⤊ 0⤋
should have asked sooner and i dont know
2007-08-20 19:57:34 · answer #3 · answered by Sunny D 1 · 0⤊ 0⤋