Molecules

The definition: Two or more atoms bonded together, representing the smallest unit of a chemical compound that can take part in a chemical reaction, best matches

• molecule
• atom
• mixture
• element

The definition: an expression which states the number and type of atoms present in a molecule of a substance, best describes 

• chemical formula
• chemical symbol
• chemical equation
• group or family

In Cl₂, the 2 is known as

• the subscript.
• the coefficient.
• the molecular mass.
• the number of protons.

Tags

NGSS.MS-PS1-1

Bonds between two nonmetal atoms are 

• covalent.
• ionic.
• incomplete.
• complete.

N_2, Cl_{2, and} O₂ are all 

• gases.
• solids.
• in the same family.
• safe to breathe.

N_2, Cl_{2, and} O₂ are all 

• diatomic molecules.
• ionic bonds.
• of equal mass.
• solids.

Tags

NGSS.MS-PS1-1

In what form is Nitrogen commonly found in nature?

• gas-N₂
• solid-N
• unknown

Oxygen is commonly found as 

• a solid-O
• a gas-O₂
• unknown

Covalent molecules such as H₂, Cl₂, I₂, Br₂, N₂, and O₂ all share electrons; therefore the prefix co in covalent means

• with or together.
• metals.
• good conductors.
• to lose.

Diatomic molecules are __________ found in nature as their single element: I, O, N, H, Br, Cl, or H.

• often
• never
• sometimes
• always