First 20 Elements, Atomic Number And Mass.

First 20 Elements, Atomic Number And Mass. Set Of Flashc Ards For
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Hydrogen
 
1 H 1
Helium
 
4 He 2
Lithium
 
7 Li 3
Beryllium
 
9 Be 4
Boron
 
11 B 5
Carbon
 
12 C 6
Nitrogen
 
14 N 7
Oxygen
 
16 O 8
Fluorine
 
19 F 9
Neon
 
20 Ne 10
Sodium
 
23 Na 11
Magnesium
 
24 Mg 12
Aluminium
 
27 Al 13
Silicon
 
28 Si 14
Phosphorus
 
31 P 15
Sulphur
 
32 S 16
Chlorine
 
35.5 Cl
Argon
 
40 Ar 18
Potassium
 
39 K 19
Calcium
 
40 Ca 20
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