Chemical Formulas

Molecules are when 2 or more elements are chemically bonded together. Ex. N₂, NaCl, P₄

• True

• False

Tags

NGSS.MS-PS1-1

Compounds are substances formed when 2 or more different elements are chemically bonded together. Ex. NaCl, HCl, CO₂

• True

• False

Tags

NGSS.MS-PS1-1

H₂ is considered both an element and a molecule.

• True

• False

Tags

NGSS.MS-PS1-1

C₆H₁₂O₆ is considered a compound and a molecule.

• True

• False

Tags

NGSS.MS-PS1-1

A coefficient is a regular size number in front of the chemical formula that tells us how many molecules there are of that compound.

• True

• False

A subscript is the little number to the right of an element symbol that tells you how many molecules there are of that compound.

• True

• False

The formula below represents the most common carbohydrate known as glucose (or sugar). Which information can be determined from the chemical formula?

C₆H₁₂O₆

• The structural arrangement of the atoms in a glucose molecule

• The color of a glucose molecule

• The size of a glucose molecule

• The number of atoms of each element in a glucose molecule

Tags

NGSS.MS-PS1-1

Which of the following are considered to be "Elements"?

• H

• NaCl

• O₂

• Zn

• CH₄

Which of the following are considered to be "Compounds"?

• CH₄

• Pb

• ZnO

• Zn₄

• C₆H₁₂O₆

Tags

NGSS.MS-PS1-1

The ________________ which are numbers that are found on the lower RIGHT hand side of each element symbol. This tells you the number of ________________ of this element in the molecule.

• Atomic number, electrons

• Subscript, atoms

• Coefficient, atoms

• Atomic number, protons

Tags

NGSS.MS-PS1-1