1
Q
First element:
A
Hydrogen (H)
2
Q
Second element:
A
Helium (He)
3
Q
Third element:
A
Lithium (Li)
4
Q
Fourth element:
A
Beryllium (Be)
5
Q
Fifth element:
A
Boron (B)
6
Q
Sixth element:
A
Carbon (C)
7
Q
Seventh element:
A
Nitrogen (N)
8
Q
Eighth element:
A
Oxygen (O)
9
Q
Ninth element:
A
Fluorine (F)
10
Q
Tenth element:
A
Neon (Ne)
11
Q
Eleventh element:
A
Sodium (Na)
12
Q
Twelfth element:
A
Magnesium (Mg)
13
Q
Thirteenth element:
A
Aluminium (Al)
14
Q
Fourteenth element:
A
Silicon (Si)
15
Q
Fifteenth element:
A
Phosphorus (P)
16
Q
Sixteenth element:
A
Sulfur (S)
17
Q
Seventeenth element:
A
Chlorine (Cl)
18
Q
Eighteenth element:
A
Argon (Ar)
19
Q
Nineteenth element:
A
Potassium (K)
20
Q
Twentieth element:
A
Calcium (Ca)
Chemistry Elements
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