Question

20 elements with their atomic no and symbols

Answer 1

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Answer 2

Atomic no Symbols
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1 H
2 He
3 Li
4 Be
5 B
6 C
7 N
8 O
9 F
10 Ne
11 Na
12 Mg
13 Al
14 Si
15 P
16 S
17 Cl
18 Ar
19 K
20 Ca

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