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

A _____________ is an ion formed from one atom Monatomic ion

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

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-)

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

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

What elements are present for most molecular compounds? ONLY nonmetals

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-)

What is the ending of all monatomic anions? ide

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

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

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

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

Anions __________ one or more valence electrons Gain

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

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

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

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

Fluorine has the following electron configuration: 1s2 2s2 2p5 7 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

Cations __________ one or more valence electrons LOSE