What do numbers on periodic table mean?

Related questions

1. Why is it called the periodic table?
2. What is atomic mass number?
3. How does the periodic table of elements work?
4. What is number 4 on the periodic table?
5. What is Group 5 called on the periodic table?
6. What is the highest atomic number?
7. Why the number of elements in the third period is 8?
8. Why are there only 8 electrons in the third shell?
9. Where is the atomic number?
10. What is the newly discovered element?

Tags

1. #periodic
2. #groups
3. #atomic
4. #elements
5. #placed
6. #order
7. #lowest
8. #element
9. #number
10. #arranged
11. #periods
12. #numbers
13. #hydrogen
14. #particular
15. #their
16. #starting
17. #nucleus
18. #protons
19. #table