question edit history translations

how many groups and periods does the modern periodic table have

6 periods and 14 groups

7 periods and 18 groups

8 periods and 19 groups

9 periods and 20 groups

The modern periodic table of the elements contains 18 groups, or vertical columns. Elements in a group have similar chemical and physical properties because they have the same number of outer electrons. The periodic table consists of seven periods. The periods vary in length.

M

2

José Carlos genesismission.jpl.nasa.gov

chemical elementschemistryscience

Chemical elements quiz Science quiz Chemistry quiz

You will play as

Answers by country

Malaysia

9%

81%

9%

0%

11

India

3%

60%

29%

5%

235

Pakistan

3%

59%

21%

12%

32

Ghana

5%

72%

22%

0%

18

Australia

12%

56%

20%

10%

48

Poland

12%

45%

31%

9%

1788

the United Arab Emirates

18%

54%

18%

0%

11

Nigeria

16%

52%

16%

10%

68

the United States

13%

46%

27%

9%

106

Canada

21%

47%

13%

13%

23

the Philippines

9%

45%

9%

27%

11

the United Kingdom

18%

40%

28%

9%

88

Greece

11%

29%

47%

11%

17

Germany

22%

28%

34%

11%

35

What is the name of the most radioactive isotope on the planet?

Which chemical element forms compounds which are typically intensely colored?

Which of the following is not a chemical element?

What is the breed of the dog?