Atomic Mass of Elements
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Atomic Mass of the First 20 Elements, rounded according to IB standards.
Last updated 8:53 PM on 10/3/24
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20 Terms
1
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Hydrogen (H)
1.01
2
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Helium (He)
4
3
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Lithium (Li)
6.94
4
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Beryllium (Be)
9.01
5
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Boron (B)
10.81
6
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Carbon (C)
12.01
7
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Nitrogen (N)
14.01
8
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Oxygen (O)
16
9
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Flourine (F)
19
10
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Neon (Ne)
20.18
11
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Sodium (Na)
22.99
12
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Magnesium (Mg)
24.31
13
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Aluminum (Al)
26.98
14
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Silicon (Si)
28.09
15
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Phosphorus (P)
30.97
16
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Sulfur (S)
32.07
17
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Chlorine (Cl)
35.45
18
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Argon (Ar)
39.95
19
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Potassium (K)
39.1
20
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Calcium (Ca)
40.08
Note 
Flashcards (20)