Across
- 4. Has a trunk
- 9. A substance made of one type of atom only.
- 10. Subatomic particle with a positive charge and a relative mass of 1. The relative charge of a proton is +1.
- 11. A substance formed by the chemical union of two or more elements.
- 13. The smallest part of an element that can exist
- 16. The characteristics of something. In chemistry, chemical properties include the reactions a substance can take part in. Physical properties include colour and boiling point.
- 17. Large marsupial
- 18. Electrically charged particle, formed when an atom or molecule gains or loses electrons.
Down
- 1. The central part of an atom. It contains protons and neutrons, and has most of the mass of the atom. The plural of nucleus is nuclei.
- 2. Likes to chase mice
- 3. Flying mammal
- 5. Subatomic particle, with a negative charge and a negligible mass relative to protons and neutrons.
- 6. Element that is a poor conductor of electricity and heat, and which forms acidic oxides.
- 7. table: A tabular representation of all known elements in order based on atomic number, eg all the noble gases are found on the right of the periodic table.
- 8. A vertical column in the periodic table containing elements with similar chemical properties.
- 12. A horizontal row in the periodic table.
- 14. Shiny element that is a good conductor of electricity and heat, and which forms basic oxides.
- 15. Man's best friend