Write the Names and Charges of These Ions/Atoms

Name: ______Class: ______Date: ______

How many protons, neutrons and electrons are present in each of the following atoms or ions?

Atom/Ion Protons Neutrons Electrons 24Mg 24Mg2+ 59Co2+ 59Co3+ 59Co 79Se 79Se2- 63Ni 59Ni2+

Common Polyatomic Ions

Write the names and charges of these ions/atoms.

1. Phosphate Ion 10. Nitride Ion 2. Chlorine Atom 11. Sulfate Ion 3. Sulfite Ion 12. Sulfide Ion 4. Acetate Ion 13. Ammonium Ion 5. Sulfur Atom 14. Nitrite Ion 6. Carbonate Ion 15. Chlorate Ion 7. Nitrate Ion 16. Hydroxide Ion 8. Chloride Ion 17. Nitrogen Atom 9. Oxide Ion 18. Oxygen Atom

Writing Chemical Formulas

ALL compounds are NEUTRAL!!! Each and every compound has a positive part and a negative part. The positive part comes FIRST and the negative part comes LAST.

Procedure: 1. Write the chemical symbol of the positive part of the compound first and then write the chemical symbol for the negative part of the compound. 2. Write the charge (oxidation number) for both the positive and the negative part of the compound. 3. Since all compounds are NEUTRAL, the charges of the chemical formula must be balanced. USE SUBSCRIPTS ONLY!! The total charge of the positive part of the compound MUST EQUAL the total charge of the negative part of the compound so the over all charge is NEUTRAL.

When more than one POLYATOMIC ION is needed—use PARENTHESES. NEVER, EVER, NEVER, use parenthesis with MONATOMIC IONS!!!!!!!!!! Write the formula for each of the following ionic compounds:

a. Sodium dihydrogen phosphate f. Ammonium hydrogen sulfate b. Lithium nitride g. Cobalt (III) nitrate c. Chromium (III) carbonate h. Mercury (I) chloride d. Tin (II) fluoride i. Potassium chlorate e. Ammonium acetate j. Sodium hydride

Write the formula for each of the following covalent compounds:

a. Sulfur difluoride b. Sulfur hexafluoride

Name each of the following compounds.

a. NaCl f. H2Se b. RbBr g. NaHSO4 c. CsF h. Ca(HSO3)2 d. AlI3 i. Ru(NO3)3 e. HI j. V2O5

Name each of the following acids/molecular compounds. d. SiF4 a. NO e. HNO3 b. NF3 f. HNO2 c. N2Cl2 g. H3PO4

Using the names below give the correct chemical formula.

1. Ammonium cyanide 2. Potassium nitrate 3. Beryllium hydroxide 17. Potassium permanganate 4. Cesium permanganate 18. Cesium bicarbonate 5. Boron iodate 19. Sodium hydroxide 6. Sodium bicarbonate 20. Hydrogen cyanide 7. Rubidium dihydrogen phosphate 21. Barium bisulfate 8. Barium hydroxide 22. Cesium nitrate 9. Ammonium hydroxide 23. Lithium chlorate 10. Sodium chlorate 24. Magnesium permanganate 11. Strontium chlorate 25. Calcium cyanide 12. Sodium nitrate 26. Beryllium acetate 13. Barium acetate 27. Magnesium bicarbonate 14. Boron bisulfate 28. Lithium bisulfate 15. Sodium acetate 29. Potassium iodate 16. Rubidium iodate 30. Calcium bicarbonate Given the chemical formula, write the correct name.

1. HOH 16. RbOH 2. LiCN 17. Be(CN)2 3. RbNO3 18. Ca(NO3)2 4. Be(ClO3)2 19. KClO3 5. Ca(MnO4)2 20. CsCH3COO 6. HCH3COO 21. KHCO3 7. NH4HCO3 22. Mg(HSO4)2 8. Ba(IO3)2 23. LiIO3 9. Mg(HSO4)2 24. B(H2PO4)3 10. Sr(NO3)2 25. NaH2PO4 11. B(CN)3 26. Ba(MnO4)2 12. Mg(OH)2 27. LiHCO3 13. RbMnO4 28. KHSO4 14. Ba(ClO3)2 29. CsIO3 15. Sr(CH3COO)2 30. NH4H2PO4

Tell how many protons, neutrons and electrons are in each atom.

1. N 2. Ca 3. Kr 4. W 5. Hg

Give the period and group in which each of these elements is found.

1. Nitrogen 2. Sodium 3. Iodine 4. Mercury

Tell how many energy levels each atom has and how many electrons are in each level.

1. N 2. Ca 3. Na 4. Kr 5. W 6. Hg

Give the name for each compound given its chemical formula.

1. KCl 6. NiF3 2. CsCl 7. SnF4 3. Mg3P2 8. CaCl2 4. CuBr 9. MnCl2 5. NiCl2 10. AuCl3 Give the correct formula for the following names.

1. Iron (II) sulfide 2. Copper (I) oxide 3. Iron (III) bromide 4. Aluminum sulfate 5. Manganese (II) cyanide 6. Silver acetate 7. Iron (III) phosphate 8. Zinc (II) carbonate 9. Lithium sulfide 10. Aluminum nitride 11. Cesium fluoride 12. sodium hydroxide 13. Gallium (I) iodide 14. Silver bromide 15. Tin (IV) chloride