Download - Formulas Review
Formulas Review
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
0
•Monatomic ion
A _____________ is an ion formed from one atom
• 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?
• Protons = 38• Electrons = 36 ( a +2
charge means it lost 2 valence electrons so you subtract 2e-)
Suppose strontium formed an ion. How many proton and electrons
does a strontium ion have?
• -2
Suppose sulfur formed an ion. What is the charge of a
sulfur ion?
How many valence electrons are present? _____
What ion will magnesium form? ____________
Explain why using the electron configuration.
Magnesium has the following electron configuration: 1s2 2s2 2p63s2
2
Mg+2
Loses the 3s2 valence electrons in order to satisfy its octet
•ONLY nonmetals
What elements are present for most molecular
compounds?
• Protons = 16• Electrons = 18 (it is a -2
charge so it gained 2 valence electrons so you add 2e-)
Suppose sulfur formed an ion. How many proton and electrons
does a sulfur ion have?
• ide
What is the ending of all monatomic anions?
a) Atom = sulfur; ion = __________
b) Atom = hydrogen ion = __________________
c) Atom = oxygen; ion = ___________________
Determine the name of the ion that would form from the following atoms.
sulfide
hydride
oxide
•Metals & nonmetals
What elements are present for most ionic compounds?
•Polyatomic ion
A ____________is an ion formed from 2 or more atoms
a) O2-2 = _________________
b)NH4+1 = ____________
c) PO3 -3 = _______________d)Br -1 = _______________e) Fe +2 = _________________
Classify each of the following as a monatomic anion, monatomic cation, polyatomic anion, or a
polyatomic cation.polyatomic anion
polyatomic cationpolyatomic anion
Monatomic cationMonatomic anion
•Gain
Anions __________ one or more valence electrons
• +2
Suppose strontium formed an ion. What is the charge of a
strontium ion?
Another name for a positive ion is a(n) ______________________
•Cation
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)
What is the ratio between cation(s) & anion(s) in the
following ionic compounds?3 1
1 1
3 2
2 1
Another name for a negative ion is a(n)
_____________
•Anion
How many valence electrons are present? _____
What ion will fluorine form? ______________
Explain why using the electron configuration.
Fluorine has the following electron configuration: 1s2 2s2 2p5
7
F-1
Gains 1 more valence electron in order to satisfy its octet
• LOSE
Cations __________ one or more valence electrons