1. Formulas Review

2. Place the ionic charges for the following groups on the Periodic Table: group 1, group 2, group 13, group 14, group 15, group 16, group 17 and group 18 +1 +2 +3 +4 -3 -2 -1

3. A _____________ is an ion formed from one atom
Monatomic ion

4. The Roman numeral tells you the POSITIVE charge of the ion
Some ions have a Roman numeral with their symbol. For example, lead II. How are the Roman numeral and charge related?
The Roman numeral tells you the POSITIVE charge of the ion

5. Suppose strontium formed an ion
Suppose strontium formed an ion. How many proton and electrons does a strontium ion have?
Protons = 38
Electrons = 36 ( a +2 charge means it lost 2 valence electrons so you subtract 2e-)

6. Suppose sulfur formed an ion. What is the charge of a sulfur ion?-2

7. Magnesium has the following electron configuration: 1s2 2s2 2p63s2
How many valence electrons are present? _____
What ion will magnesium form? ____________
Explain why using the electron configuration.
Mg+2
Loses the 3s2 valence electrons in order to satisfy its octet

8. What elements are present for most molecular compounds?
ONLY nonmetals

9. Suppose sulfur formed an ion
Suppose sulfur formed an ion. How many proton and electrons does a sulfur ion have?
Protons = 16
Electrons = 18 (it is a -2 charge so it gained 2 valence electrons so you add 2e-)

10. What is the ending of all monatomic anions?
ide

11. Determine the name of the ion that would form from the following atoms.
sulfide
Atom = sulfur; ion = __________
Atom = hydrogen ion = __________________
Atom = oxygen; ion = ___________________
hydride
oxide

12. What elements are present for most ionic compounds?
Metals & nonmetals

13. A ____________is an ion formed from 2 or more atoms
Polyatomic ion

14. O2-2 = _________________ NH4+1 = ____________ PO3 -3 = _______________
Classify each of the following as a monatomic anion, monatomic cation, polyatomic anion, or a polyatomic cation.
polyatomic anion
O2-2 = _________________
NH4+1 = ____________
PO3 -3 = _______________
Br -1 = _______________
Fe +2 = _________________
polyatomic cation
polyatomic anion
Monatomic anion
Monatomic cation

15. Anions __________ one or more valence electrons
Gain

16. Suppose strontium formed an ion. What is the charge of a strontium ion?+2

17. Another name for a positive ion is a(n) ______________________
Cation

18. What is the ratio between cation(s) & anion(s) in the following ionic compounds?3 1
Li3PO3= ______lithium ion(s) : _____ phosphate ion(s)
KCl = _____ potassium ion(s) : ________ chloride ion(s)
Mg3(SO3)2 = ____ magnesium ion(s) : ____sulfite ion(s)
Ag2SO4 = _____silver ion(s) : _______ sulfate ion(s) 1 1 3 2 1 2

19. Another name for a negative ion is a(n) _____________
Anion

20. Fluorine has the following electron configuration: 1s2 2s2 2p57
How many valence electrons are present? _____
What ion will fluorine form? ______________
Explain why using the electron configuration.
F-1
Gains 1 more valence electron in order to satisfy its octet

21. Cations __________ one or more valence electrons
LOSE