Unit Two Part A Review

A _______ is a pure substance that cannot be be broken down into simpler substances.

• compound

• atom

• molecule

• element

The smallest unit of a chemical element is a(n) _________.

• compound

• atom

• molecule

• element

Two or more atoms chemically bonded together is a(n) _________.

• compound

• atom

• molecule

• element

A ______ is a group of atoms covalently bonded to act like a single unit.

• compound

• atom

• molecule

• element

Where on the periodic table would you find the number of protons in the nucleus?

• atomic mass

• atomic number

• period number

• group number

Where on the periodic table would you find the number of protons and neutrons in the nucleus?

• atomic mass

• atomic number

• period number

• group number

Where on the periodic table would you find the number of orbitals the atom possesses?

• atomic mass

• atomic number

• period number

• group number

Where would you find the number of valence electrons on the outermost orbital?

• atomic mass

• atomic number

• period number

• group number

How many protons would you find in the nucleus of Magnesium?

• 24

• 25

• 2

• 12

How many neutrons would you find in the nucleus of Magnesium?

• 24

• 25

• 2

• 12