1. CaO Calcium(II) oxide
2. CdBr2 Cadmium(II) bromide
3. CuCl2 Copper chloride
4. Li2O Lithium(II) oxide
5. KClO Potassium(I) hypochlorite
6. Mg(H2PO4)2 Magnesium phosphate
7. None of the Above
2007-05-23 12:52:57 · 5 answers · asked by stevovanzant 1 in Science & Mathematics ➔ Chemistry
The roman numerals are only used for transition metals, this rules out 1, 4 and 5. Number 3, copper is a transition metal so it needs a roman numeral; number 3 is incorrect.
Number 6, phoshpate is PO4 not H2PO4, so it is incorrect.
Number 2 is correct, CdBr2 is cadmium (II) bromide.
2007-05-23 12:59:27 · answer #1 · answered by spikescomp 2 · 0⤊ 1⤋
5
2007-05-23 12:58:21 · answer #2 · answered by rlbickmore 2 · 0⤊ 1⤋
All of them are wrong. SO 7 IS CORRECT
1,2,4, and 5 are wrong because all of them have parentheses when they don't need it. They have no other possible charge. You might think that Cadmium does because it is a transition metal but it doesn't.
3 is wrong because it doesn't have a parenthesis when it needs it because it can be (I) for +1 charge or (II) for +2 charge.
5 is wrong because it is called MAGNESIUM DIHYRDROGEN PHOSPHATE not magnesium phosphate.
If you need more help on naming compounds, here's a REALLY GOOD WEBSITE THAT TELLS YOU EVERYTHING YOU EVER NEED TO KNOW:
http://www.wise.k12.va.us/jjk/Chemistry/formula.htm
2007-05-23 13:05:32 · answer #3 · answered by Anonymous · 0⤊ 1⤋
1 and 2 are correct, 4 and 6 are wrong. 5 I'll pass on, never could get the hang of hypochlorite. 3 is kind of correct, but since copper chloride could be CuCl (cuprous chloride) or CuCl2 (cupric chloride), I reckon its in as a trick question to catch you out. the proper name would be Copper (II) chloride.
2007-05-23 13:02:37 · answer #4 · answered by LabMonkey 3 · 0⤊ 1⤋
Well I know number 1 is right. It is also known as caustic lime.
2007-05-23 12:57:38 · answer #5 · answered by Lady Geologist 7 · 0⤊ 1⤋