Chemistry EF & MF Practice Vocabulary Quiz

What does the empirical formula represent in a compound?

• The simplest whole-number ratio of atoms of each element present

• The actual number of atoms of each element present

• The percentage by mass of each element

• The mass of one mole of a substance

What is the molecular formula of a compound?

• The simplest whole-number ratio of atoms

• The actual number of atoms of each element present

• The percentage by mass of each element

• The SI unit for the amount of a substance

What does percent composition by mass indicate?

• The simplest whole-number ratio of atoms

• The actual number of atoms of each element

• The percentage by mass of each element in a compound

• The mass of one mole of a substance

What is a mole in chemistry?

• The simplest whole-number ratio of atoms

• The actual number of atoms of each element

• The SI unit for the amount of a substance, defined as containing exactly 6.02214076 × 10²³ elementary entities

• The mass of one mole of a substance

What does molar mass refer to?

• The simplest whole-number ratio of atoms

• The actual number of atoms of each element

• The percentage by mass of each element

• The mass of one mole of a substance, expressed in grams per mole (g/mol)

What is a chemical formula?

• A pure substance consisting only of atoms with the same number of protons

• A symbolic representation of the composition of a chemical compound

• The basic unit of a chemical element

• A number indicating the number of atoms of an element

Tags

NGSS.MS-PS1-1

What is a compound?

• A pure substance consisting only of atoms with the same number of protons

• The basic unit of a chemical element

• A substance formed when two or more chemical elements are chemically bonded together

• A number indicating the number of atoms of an element

Tags

NGSS.MS-PS1-1

What is an element?

• A pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei

• The basic unit of a chemical element

• A symbolic representation of a chemical compound

• A number indicating the number of atoms of an element

What is an atom?

• A pure substance consisting only of atoms with the same number of protons

• The basic unit of a chemical element

• A symbolic representation of a chemical compound

• A number indicating the number of atoms of an element

Tags

NGSS.MS-PS1-1

What is a subscript in a chemical formula?

• A pure substance consisting only of atoms with the same number of protons

• The basic unit of a chemical element

• A symbolic representation of a chemical compound

• A number written below and to the right of a chemical symbol, indicating the number of atoms of that element