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Periodic Table Crossword

Matthew Guerra

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20    

Across
1.How many valence eletrons are need to make an atom stable
5.My symbol is Eu
9.The "staircase" is where the whats are located
10.I have 119 atomic mass
12.I have 74 protons
17.What is the name of group 14
18.What is the big group of metals in the middle called
19.My symbol is Hg
20.How many elements are in the periodic table of elements
Down
2.My atomic number is 77
3.I created the periodic table of elements
4.My symbol is Sb
6.My atomic number is 14
7.Name the Period at the very bottom of the table
8.A period tells you how many what it has
11.What is the name of group 18
13.What is the name of group 13
14.My atomic number is 92
15.My sybol is Y
16.What are the columns called

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