Chemical Formulas and Molecules Quiz

What is a combination of chemical symbols and numbers that represents a single unit of a substance called?

• Chemical formula

• Chemical reaction

• Chemical bond

• Chemical equation

What is the term for a specific group of atoms held together by chemical bonds?

• Molecule

• Element

• Compound

• Mixture

Tags

NGSS.MS-PS1-1

What does a chemical formula show?

• The exact atoms in each molecule or unit

• The color of the substance

• The melting point of the substance

• The physical state of the substance

Tags

NGSS.MS-PS1-1

In any substance containing atoms of different elements, how are the atoms always present?

• In the same ratio

• In random amounts

• In different ratios each time

• Only as single atoms

Tags

NGSS.MS-PS1-1

What does a chemical formula use to represent the elements that make up a substance?

• Numbers

• Colors

• Symbols

• Shapes

What does a subscript in a chemical formula indicate?

• The color of the element

• The number of atoms of that element

• The temperature of the element

• The mass of the element

If there is no subscript next to an element symbol in a chemical formula, how many atoms of that element are present?

• Two

• None

• One

• Four

Tags

NGSS.MS-PS1-1

What does a group in parentheses in a chemical formula represent?

• Atoms that are held together as a group within the compound

• Atoms that are not part of the compound

• The color of the compound

• The temperature of the compound

Tags

NGSS.MS-PS1-1

What do subscripts outside the parentheses in a chemical formula show?

• The number of elements in the compound

• The number of groups there are

• The color of the groups

• The temperature of the groups

A chemical formula is written as H₂SO₄. Based on your understanding, how many hydrogen atoms are present in this compound?

• 1

• 2

• 4

• 6

Tags

NGSS.MS-PS1-1