Molecules and Compounds

What You'll Learn

Molecules form when two or more atoms bond together. A water molecule has two hydrogen atoms bonded to one oxygen atom, written as H₂O.

Key Words

condensation
boiling

Materials Needed

ice cubes
salt
sugar
vinegar

Safety First

Do not look directly at the sun or bright lights.
Clean up spills immediately to prevent slipping.

Steps

Step 1 — Read

Read and learn: Molecules form when two or more atoms bond together. A water molecule has two hydrogen atoms bonded to one oxygen atom, written as H₂O.

Step 2 — Do

Measure and record your data in a table.

Step 3 — Observe

Note any unexpected results.

Step 4 — Record

Share your findings with the class or a partner.

Check Your Understanding

Question 1

1 of 3

What is the smallest unit of an element?