Across
- 8. 1kg gold or 1 kg wool
- 9. what is the first element of the periodic table
- 11. what orbits the electron shell
- 12. what atom has neutral charge
- 14. how many protons does argon have
- 16. has 5 protons and the atomic number is 11
- 20. atom have
- 21. how many protons does oxygen have
- 22. how many protons do lithium have
- 23. how many neutron does pottassium have
- 24. how many protons are there in berylium
- 25. what atom has positive charge
Down
- 1. has proton and neutron
- 2. how much does sodium neutron have
- 3. how much does proton
- 4. who came up with atom structure
- 5. what alkali metal is the most reactive
- 6. how much atomic number have the sodium
- 7. which group does the alkali metals belong
- 10. where rutherford was born
- 13. how many protons does hydrogen have
- 15. what atom has negative charge
- 17. who did the gold foil experiment
- 18. which alkali metal have the highest melting point
- 19. how many electrons are there in atom of carbon