so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements?
ex. P02
the P for Phosphorus doesn't have a number does it mean it is a one then
ex.SO3
ex.FeCl3
ex.SnCl2
ex.Cu2O
ex.NiBr2
and can you check my answers for and can you tell me which ones are wrong and to correct it...
SnCl2 = Tin(II)Chloride
Cu2O = Copper(I)Oxide
NiBr2 = Nickel(II)Bromide
FeO = Iron(II) Oxide
SbBr5 = Antimony(V)Bromide
CoO = Cobalt(II)Oxide
MnF2 = Manganese(II)Fluoride
SnO2 = Tin(II)Oxide
SO2 = Tin(I)Oxide
BrF7 = Bromine(VI)Fluoride
1. Cobalt(II)Chloride = Co2Cl = CoCl2
2. Sulphur(II)Iodide = S2I1 = SI2
3. Iron(III)Chloride = Fe3Cl1= FeCl3
4. Antimony(V)Sulphide = Sb5S2 = Sb2S5
5. Lead(II)Nitride = Pb2N3 = Pb3N2
6. Tin(II)Fluoride = Sn2F1 = SnF2
7. Copper(II)Oxide = Cu2O2 = CuO
8. Tin(IV)Chloride = Sn4Cl1= SnCl4
9. Mercury(I)Phospide = Hg1P3 = Hg3P
i know that it is a lot of questions but i only put that many is because i am scared that i wont understand with only 1 or 2 examples if and when i am wrong so plz check and answer ASAP cause i need help for it
Yes, if no subscript is shown it is understood to be 1.
For the first part all are ok except these two.
SO2 = Tin(I)Oxide
S is sulfur (not tin) and I would name this sulfur dioxide but I believe the IUPAC name would be sulfur(IV) oxide.
BrF7 = Bromine(VI)Fluoride
Wouldn't this one be bromine(VII) fluoride? bromine (VI) fluoride would be BrF6.
For the last group I think you have a problem. The last formula you wrote in each line is correct for every one of the compounds listed; however, what you have in between is not right for any of them. For example, Co2Cl IS NOT = CoCl2. CoCl2 is the correct formula for cobalt(II) chloride. You may be using a mnemonic or some memory device to help you come up with the right answer and if it helps you (because all of them are right) ok; however, putting in that middle step on paper is not right. I suspect your prof would give you a failing grade. So do that middle step, if it helps you, in your head but don't write it down. I'm assuming this is a device to help you get it correct. It is isn't; i.e., if you have written both in the hopes one is correct let me know for we need to go through to get them right. Profs will not pick and choose the right answer in these instances.
When there is no subscript indicated next to an element in a chemical formula, it is usually understood to have a subscript of 1. However, it's always a good idea to verify the valency of an element using the periodic table if you are uncertain.
Now, let's go through your examples and check your answers:
1. SnCl2 - Tin(II)Chloride - Correct. It indicates that tin has a valency of 2, hence SnCl2.
2. Cu2O - Copper(I)Oxide - Correct. Copper has a valency of 1 in this compound, so it is copper(I).
3. NiBr2 - Nickel(II)Bromide - Correct. Nickel has a valency of 2 in this compound, so it is nickel(II).
4. FeO - Iron(II) Oxide - Incorrect. Iron has a valency of 2 in this compound, so it should be iron(II).
5. SbBr5 - Antimony(V)Bromide - Incorrect. Antimony has a valency of 5 in this compound, so it should be antimony(V). However, bromine is in group 7, so it should be bromine(V).
6. CoO - Cobalt(II)Oxide - Correct. Cobalt has a valency of 2 in this compound, so it is cobalt(II).
7. MnF2 - Manganese(II)Fluoride - Correct. Manganese has a valency of 2 in this compound, so it is manganese(II).
8. SnO2 - Tin(II)Oxide - Incorrect. Tin has a valency of 4 in this compound, so it should be tin(IV).
9. SO2 - Sulfur(IV)Oxide - Correct. Sulfur has a valency of 4 in this compound, so it is sulfur(IV).
10. BrF7 - Bromine(VII)Fluoride - Correct. Bromine is in group 7 and has a valency of 1, so it is bromine(VII).
Now let's go through the additional questions you provided:
1. Cobalt(II)Chloride - Correct. The correct formula is CoCl2, indicating cobalt(II).
2. Sulphur(II)Iodide - Incorrect. The correct formula is SI2, indicating sulfur(I).
3. Iron(III)Chloride - Correct. The correct formula is FeCl3, indicating iron(III).
4. Antimony(V)Sulfide - Correct. The correct formula is Sb2S5, indicating antimony(V).
5. Lead(II)Nitride - Correct. The correct formula is Pb3N2, indicating lead(II).
6. Tin(II)Fluoride - Correct. The correct formula is SnF2, indicating tin(II).
7. Copper(II)Oxide - Incorrect. The correct formula is CuO, indicating copper(I). Copper(II) would be CuO2.
8. Tin(IV)Chloride - Correct. The correct formula is SnCl4, indicating tin(IV).
9. Mercury(I)Phosphide - Incorrect. The correct formula is Hg3P2, indicating mercury(II).
Remember, it's always important to verify the valency of elements using the periodic table to ensure accurate formulas.