Chemical Nomenclature Vocabulary and Polyatomic Ions

Which term describes a molecule consisting of two atoms of the same element, such as H2 or O2?

• Monatomic ion

• Diatomic molecule

• Polyatomic ion

• Chemical formula

What is the correct definition of a monatomic ion?

• A covalently bonded group of atoms with an overall charge

• A molecule composed of two identical atoms

• A single atom with a positive or negative charge from losing or gaining valence electrons

• A representation showing element ratios in a compound

IUPAC nomenclature refers to which of the following?

• The naming rules established by the International Union of Pure and Applied Chemistry

• A list of common polyatomic ions

• The oxidation states of transition metals

• Prefixes used to count atoms in covalent compounds

Which prefix corresponds to the number five in chemical naming?

• Hexa

• Hepta

• Penta

• Nona

Select the correct match of prefix to number: hexa = ?

• 5

• 6

• 7

• 9

What does the term oxidation number represent?

• The number of atoms bonded to a central atom

• A positive or negative number indicating electrons gained or lost to become stable

• The mass number of an isotope

• The count of molecules in one mole

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement best defines a polyatomic ion?

• A neutral molecule of two atoms

• A covalently bonded group of atoms acting as a unit with a net charge

• Any single atom with a charge

• A structural formula showing bonds

Identify the correct formula for the ammonium ion.

• NH4+

• NO3−

• OH−

Which of the following correctly pairs the ion name with its formula for sulfate?

A student writes the formula for nitrate as NO2−. Based on the vocabulary bank, what is the correct name for NO2−?

• Nitrate

• Nitrite

• Nitride

• Nitrosyl