Chemical Formulae

Multiple Choice

An ionic compound of calcium and chlorine would be named

• calcium chlorine.
• calcium chlorite.
• calcium chloride.
• chlorine calcium.

Multiple Choice

A covalent compound made of one sulfur and two oxygen atoms would be named

• sulfur dioxide.
• sulfur oxide.
• disulfur oxide.
• sulfide oxygen.

Multiple Choice

An ionic compound made of copper (Cu²⁺) and oxygen would be named

• copper oxygen.
• copper oxide.
• dicopper oxide.
• copper(II) oxide.

Multiple Choice

Because the overall charge in a compound must be ____________, the charge of iron in Fe₂O₃ can be calculated as 3⁺.

• 2⁺
• 1⁺
• 0
• 1^-

Multiple Choice

In the compound TiO₂, titanium has a charge of

• 4⁺
• 2⁺
• 2^-
• 4^-

Multiple Choice

The chemical formula for an ionic compound of aluminum and chlorine is

• AlCl.
• ClAl.
• AlCl₃.
• Al₃Cl.

Multiple Choice

The chemical formula for an ionic compound of potassium and oxygen is

• KO.
• K₂O.
• K₂O₂.
• KO₂.

Multiple Choice

Magnesium Nitrate

• Mg(NO₃)₂

• Mg (NO₃)₃

• Mg (NO₃)

Multiple Choice

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

Multiple Choice

Name the following ionic compound: BeCl₂

• beryllium chlorine

• beryllium II chloride

• beryllium chloride

• beryllium dichloride

Multiple Choice

All elements in group 1 have what type of ion?

• 0
• -1
• +1
• 1

Multiple Choice

Name this compound: NaBr

• Bromide sodide

• Sodium bromide

• Sodium bromate

• Sodium bromite

Multiple Choice

What is the correct formula for the compound, lithium oxide?

• LiO

• Li₂O₂

• LiO₂

• Li₂O

Multiple Choice

Name this compound: KF

• Potassium fluoride

• Potassium fluorite

• Fluorine potasside

• potassium (i) fluoride

Multiple Choice

The sum of all oxidation numbers in a neutral compound is ___.

• 0
• 1
• -1
• depends on the compound

Multiple Choice

LiBr is called

• lithium bromine
• lithium (I) bromine
• lithium bromide
• lithuim (I) bromide

Multiple Choice

Which of the following is NOT an ionic compound?

• Br₂

• KI

• BaCl₂

• CaO

Multiple Choice

CaO 

• Calcium monoxide
• Monocalcium monoxide
• Calcium oxide

Multiple Choice

Lead Nitrate

• PB(NO_3)₂

• Pb(NO_3)₂

• Pb(NO_3)

Multiple Choice

MgS 

• Magnesium sulfide
• Monomagnesium monosulfide
• Magnesium monosulfide

Multiple Choice

What is the formula for manganese(III) oxide?

• MgO

• MnO

• Mn₂O₃

• Mg₂O₃

Multiple Choice

What is oxidation number of Cr in
Cr₂O₇^2-?

• -2
• +2
• +6
• +12

Multiple Choice

Name the following ionic compound:MgO

• manganese (II) oxide

• magnesium oxide

• magnesium sulfide

• manganese monoxide

Multiple Choice

Hydrogen and metals lose electrons and form negative ions.

• True

• False

• I don't know.

Multiple Choice

When naming ionic compounds with transition metals you need to include Roman numerals to show the _____ of the metal.

• atomic number

• mass number

• electronegativity

• oxidation number

Multiple Choice

What are oxidation numbers?

• Number of electrons in the outer most energy level
• Number of protons
• Electrons gained or lost in chemical bonding
• Number of neutrons gained or lost

Multiple Choice

The chemical formula of Iron (III) bromide is

• FeBr₃

• Fe₂Br₃

• Fe(III)Br

• FeBr

Multiple Choice

Name this compound: SO₃

• Sulphur (VI) oxide

• Sulphur trioxide

• Monosulphur trioxide

• Sulphur (III) oxide

Multiple Choice

Oxidation number of O in its stable elemental form, O₂:

• 0

• -1

• -2

• +2

Multiple Choice

Name this compound SbCl₃

• Antimony trichloride

• Strontium trichloride

• Antimony (III) chloride

• Strontium (III) chloride

Multiple Choice

The formula for Platinum (IV) oxide is:

• Pt2O4

• PtO4

• Pt2O5

• PtO2

Multiple Choice

Oxidation number of Fe in Fe²⁺ ion:

• 0

• -2

• +2

• +3

Multiple Choice

Calcium Hydroxide

• Ca(OH)

• CaH₂

• Ca(OH)₂

Multiple Choice

What is the charge, or oxidation number, for elements in Group 2?

• -2

• +2

• -3

Multiple Choice

Non-metals form ___________ ions, with names ending with _________.

• positive, -ide

• positive, -ite

• negative, -ide

• negative, -ite

Multiple Choice

What is the oxidation state of Cl in ClO^- ?

• 0

• +1

• -1

• +2

Multiple Choice

Barium Chloride

• BaCL₂

• BaCl₂

• BaCl

Multiple Choice

C in CO₃^2-?

• -4

• +2

• 0

• +4

Multiple Choice

Determine the oxidation numbers and Valence Electrons for Br.

• -1, 7
• +3, 2
• -1, 3
• +7, 3

Multiple Choice

Na₂SO₄

• Sodium Sulphate

• Sodium Sulphite

• Sodium Sulphide

Multiple Choice

When an atom loses an electron, it becomes a(n) _____________ ion.

• positive

• negative

• neutral

• polyatomic

Multiple Choice

CaO

• Calcium oxalate

• Carbondioxide

• Calcium Oxide

Multiple Choice

(NH₄)OH

• Ammonium Hydroxide

• Aluminium Hydroxide

• Ammonium Peroxide

Multiple Choice

Ions are: 

• atoms with a positive or negative charge
• atoms with no charge
• atoms with ONLY a positive charge
• atoms with ONLY a negative charge

Multiple Choice

Calcium Phosphate

• Ca₂(PO₄)₂

• Ca₃(PO₄)₂

• Ca₂(PO₄)₂

Multiple Choice

Zinc Oxide

• ZnO

• Zn₂O₂

• ZnO₂

Multiple Choice

Magnesium's ion

• Mg⁺
• Mg²⁺
• Mg^-
• Mg^2-

Multiple Choice

Sodium loses an electron. What is its ionic charge?

• neutral 
• -1
• +1
• +11