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As you move from left to right on the periodic table the atomic number
Check all of the following that Calcium and Beryllium have in common. (3 choices)
What do all elements in group 17 have in common? (3 choices)
The periodic table is mostly made up of , followed by , and then .
Match the following descriptions with the correct substance:
Bonus: Which element is most likely to have four electron energy levels? (Look at the number of rings around the nucleus)
Which three elements are most likely to have two electron energy levels? (Look at the number of rings around the nucleus)
Which element is located in period 2 and group 18?
Select ALL of the following that have two valence electrons. (3 choices)
Elements in group 1 are very reactive, while elements in group 18 are the least reactive. Which of the following elements would be the most reactive?