Oxidation Numbers
In a stable, unreacted element, what is its oxidation number?
0
When naming binary covalent compounds, which element is written first?
The element with the lower electronegativity
What prefix is used when naming binary acids?
Hydro-
What term describes a charged group of atoms bonded covalently?
Polyatomic Ions
What is the formula for magnesium chloride?
MgCl₂
The sum of oxidation numbers in a neutral compound must always equal what value?
0
In the Stock system, what does the Roman numeral indicate?
The oxidation number of the metal
When HCl is dissolved in water, what name does it take?
Hydrochloric Acid
What type of anion contains oxygen and at least one other element?
Oxyanion
What is the formula for sodium phosphate?
Na₃PO₄
When hydrogen is bonded to a metal in a metallic hydride, what is its oxidation number?
-1
Which system is used internationally for chemical nomenclature?
IUPAC (International Union of Pure and Applied Chemistry)
An acid formed from an anion ending in "-ate" will have what suffix?
-ic
Which type of compounds often contain polyatomic ions?
Ionic Compounds
What is the formula for iron(III) sulfate?
Fe₂(SO₄)₃
Alkali metals (Group 1) have what oxidation number when in compounds?
1+
What prefix represents six atoms in a compound?
Hexa-
Acids containing hydrogen, oxygen, and another nonmetal are called what?
Oxyacids
What distinguishes a ternary acid from a binary acid?
A ternary acid contains oxygen, while a binary acid does not.
What is the formula for dinitrogen tetroxide?
N₂O₄
In a polyatomic ion, how does the sum of oxidation numbers relate to its overall charge?
The sum of oxidation numbers equals the charge of the ion.
When should parentheses be used in a polyatomic ionic compound's formula?
When there is more than one of a polyatomic ion in the formula
If an anion ends in "-ite," what ending is used in the name of its acid?
-ous
Which of the following compounds would require the Stock system for naming: NaCl, CuO, or CO₂?
CuO
What is the chemical name for K₂CO₃?
Potassium carbonate