Across
- 1. a metallic chemical element that is easily formed into sheets and wires
- 4. atom or group of atoms that bears a positive electric charge.
- 6. A substance that has only 1 atom
- 8. Elements can be found
- 11. An atom is the smallest unit of ordinary matter that forms a chemical element.
- 13. Zinc is a slightly brittle metal at room temperature
- 15. Most reactive chemical element and group 17 in the periodic table
- 16. the atomic number is 12
- 20. A positive charge
- 23. A column in the periodic table of the chemical elements
- 24. the outermost shell of an atom containing the valence electron
- 26. Carries a negative charge
- 27. the third-most abundant gas in the Earth's atmosphere .
- 28. The horizontal rows in the periodic table
- 29. An alkaline earth metal
Down
- 2. The atomic number is 19 and it’s an alkali metal
- 3. a stable subatomic particle with a charge of negative electricity
- 5. the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.
- 7. a subatomic particle of about the same mass as a proton but without an electric charge
- 9. producing electricity.
- 10. soft silvery-white metal
- 12. an atomic orbital is a mathematical function describing the location and wave-like behavior of an electron in an atom.
- 14. A substance characterised by high electrical and thermal conductivity
- 17. The smallest particles of a substance that usually has more than 1 atom
- 18. atom or molecule with a net electrical charge.
- 19. a compound with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids
- 21. odourless reactive gas, the chemical element of atomic number 8
- 22. a non-metal with semiconducting properties, used in making electronic circuits.
- 25. occurs in minute quantities in Earth's atmosphere and trapped within the rocks of Earth's crust.