Across
- 3. The maximum number of known electron shells in an atom
- 6. When a single compound breaks down into two or more simpler products
- 9. The fifteenth element on the periodic table
- 13. When elements or compounds rearrange themselves in an equation
- 14. The type of atom bonding when electrons are shared
- 15. The name for a row in the periodic table
- 16. A chemical reaction between a substance and oxygen
- 19. The name for a column in the periodic table
- 20. The name for a bunch of atoms bonded together
- 22. When a nucleus loses or gains a neutron
- 24. The last element in the periodic table (118th)
- 25. The element with the chemical symbol 'Mg'
Down
- 1. The name of element made only in a lab by scientists
- 2. What is produced when elements combine together chemically
- 4. The name of the subatomic particle orbiting the nucleus
- 5. A reaction when an acid is added to a base, forming water and at least one other substance
- 7. The name for the number of protons in an atom (2 words no spaces)
- 8. The positively charged subatomic particle within the nucleus of an atom
- 10. Chemicals that change colour when added to an acid or a base
- 11. An element made up of only one atom (2 words no spaces)
- 12. The process or result of something being oxidised
- 17. When two or more substances combine to produce a single substance
- 18. The total number of protons and neutrons in an atom (2 words no spaces)
- 21. The name of the person to develop the first scientific model of an atom (2 words no spaces)
- 22. The type of atom bonding when electrons are transferred
- 23. The sharing of electrons in chemistry
- 26. The name for the metals in the first group of the peroidic table