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periodic table challenge

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Last updated almost 5 years ago
6 questions
1
1
1
1
Question 4
4.

What is a group

1
1
Question 1
1.

What is group 1 called?

Question 2
2.

What is group 2 called?

Question 3
3.

What is group 7 called?

Question 5
5.

What is a period?

Question 6
6.

How many periods are in periodic table?