Molecules, Compounds, & Chemical Formulas - 6.5c

What is a compound?

• A compound is a mixture of two or more substances that can be separated by physical means.

• A compound is a substance formed when two or more different elements are chemically bonded.

• A compound is a single element that cannot be broken down into simpler substances.

• A compound is a type of solution that contains only one solute.

What does a chemical formula represent?

• The color of a substance

• The types and numbers of atoms in a molecule.

• The temperature at which a substance boils

• The mass of a molecule in grams

What is a molecule?

• A group of two or more atoms bonded together.

• A single atom that cannot be divided.

• A type of chemical reaction between elements.

• A mixture of different substances.

How many total atoms are in a molecule of H₂SO₄?

• 6

• 7

• 8

• 5

What is the chemical formula for water?

• H₂O

• CO₂

• NaCl

• C₆H₁₂O₆

Which of the following is a chemical formula? H₂SO₄, Si, Hg, C

• H₂SO₄

• Si

• Hg

• C

How many Carbon atoms (C) are in a CO₂ molecule?

• 0

• 1

• 2

• 3

What does the subscript in a chemical formula indicate?

• It indicates the type of element present in the molecule.

• It indicates the number of atoms of the element in the molecule.

• It indicates the charge of the molecule.

• It indicates the state of matter of the element.

How many Oxygen atoms (O) are in a molecule of H₂O?

• 0

• 1

• 2

• 3

Which statement best describes the relationship between atoms & molecules?

• Molecules are made of atoms that are bonded together.

• Atoms are larger than molecules.

• Molecules can exist without atoms.

• Atoms are the smallest units of molecules.