Across
- 2. Water is this because it contains atoms of hydrogen and oxygen bonded together.
- 4. Gold and oxygen are examples of this type of pure substance.
- 7. If you kept cutting a piece of gold into smaller pieces, you would eventually reach this.
- 8. Scientists use this chart to predict an element's properties and locate its atomic number.
- 9. Atoms and molecules are examples of these tiny building blocks of matter.
- 10. The number of these particles determines the identity of an element.
- 11. Everything you can touch, hold, or see is made of this.
Down
- 1. Water and salt are examples because they have a specific composition and properties.
- 3. Changing the number of these particles creates isotopes of the same element.
- 5. These particles are responsible for chemical bonding and electricity.
- 6. Oxygen gas and water are examples of this type of particle.