Science

2. who was an english physicist
8. how much atomic mass unit does a neutron have
11. when representing an element , what is the minimum of items you must have
14. what particle does the extra nuclear region have
18. what words represent the amount of protons and neutrons in the nucleus
20. who was the first person to discover the atom
21. the amount of protons in the nucleus is called .....
23. what is the element for the symbol NA
24. how many regions does the atom have

1. what do you call atoms that have the same amount of protons but different amount of neutrons
3. who discovered the electron
4. what charge does a neutral atom have
5. what has momentum but no electric charge
6. what charge does a proton have
7. who discovered the neutron
9. what has a negative charge
10. within the extra nuclear region, are found.......... concentric orbits
12. a ....... atom has the same amount of protons and electrons
13. what takes up approximately 99% of an atoms volume
15. what is the shortened way of saying atomic mass units
16. what is the lightest element in its gaseous state
17. what is the 19th element on the periodic table
19. what is the smallest part of matter
22. what is the 5th element in the periodic table