First 20 Elements
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Last updated 11:20 PM on 8/23/26
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20 Terms
1
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Ca
Calcium, #20
2
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K
Potassium, #19
3
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Ar
Argon, #18
4
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Cl
Chlorine, #17
5
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S
Sulfur, #16
6
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P
Phosphorus, #15
7
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Si
Silicon, #14
8
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Al
Aluminum, #13
9
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Mg
Magnesium, #12
10
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Na
Sodium, #11
11
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Ne
Neon, #10
12
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F
Flourine, #9
13
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O
Oxygen, #8
14
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N
Nitrogen, #7
15
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C
Carbon, #6
16
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B
Boron, #5
17
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Be
Beryllium, #4
18
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Li
Lithium, #3
19
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He
Helium, #2
20
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H
Hydrogen, #1