What are groups and periods in periodic table?

Related questions

1. What are the groups called on periodic table?
2. What are periods and groups in the periodic table?
3. What is Group 4 on the periodic table called?
4. What are the groups in 1?
5. Which group in periodic table is metal?
6. Are there 8 or 18 groups in the periodic table?
7. What is Group 15 on the periodic table called?
8. What are the periodic table groups called?
9. What are the eight groups of the periodic table?
10. What are the 18 groups on the periodic table?

Tags

1. #order
2. #table
3. #atomic
4. #elements
5. #periods
6. #period
7. #periodic
8. #seven
9. #vertical
10. #horizontal
11. #numbers
12. #appear
13. #column
14. #their
15. #beginning
16. #similar
17. #group
18. #there
19. #properties
20. #arrangement