Across
- 3. the electrons are arranged in an electron __
- 4. __ number = number of protons in an atom
- 5. forms when an atom loses or gains electrons
- 7. __ number = no. of protons + no. of neutrons
- 8. has a relative charge of +1 in an atom
- 10. sodium is an example of a __
- 11. has a relative charge of 0 in an atom
- 12. __ ions are formed when atoms gain electrons
- 14. __ ions are formed when atoms lose electrons
Down
- 1. has a relative charge of -1 in an atom
- 2. ionic bonds are formed from the __ of electrons
- 6. chlorine is an example of a __
- 9. smallest particle of an element
- 12. elements in group viii are called __ gases
- 13. metals and non-metals can form __ bonds