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Periodic Table of Elements Atomic Numbers #1-20

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tafidexa's version from 2015-10-07 22:50

Section 1

Question Answer
1Hydrogen
2Helium
3
4
5
6Carbon
7Nitrogen
8Oxygen
9
10Neon
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Section 2

Question Answer
11Sodium
12Magnesium
13Aluminum
14Silicon
15Phosphorus
16Sulfur
17Chlorine
18Argon
19Potassium
20Calcium
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