Molecules, elements, and compounds

Atoms, Molecules and Elements

Chemistry - Mr. Boyd

Multiple Choice

This is the smallest unit of an element.

• atom

• molecule

• compound

• nucleus

Multiple Choice

Atoms come together in different ways to make ________________.

• Substances

• Matter

• Molecules

Multiple Select

Select all the examples of elements.

• Oxygen- O

• Salt- NaCl

• Hydrogen- H

• Water- H2O

• Gold- Au

Multiple Choice

The smallest part of a compound that has all the same properties of that compound is a ___________.

• mixture

• element

• molecule

• atom

Multiple Choice

What do we call this arrangement of chemical elements?

• The proton chart of atoms

• The periodic table of elements

• The periodic table of molecules

A Compound

A substance composed of 2 or more elements chemically bonded.

Component elements have a definite ratio (E.g. 2:1 for H:O in water)

Compounds can be separated by chemical means into their component elements.

Multiple Choice

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Multiple Choice

Is Iron (Fe) an element or a compound?

• Element
• Compound