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21-10-2022
Chemistry

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The table shows the numbers of particles present in the nuclei of four atoms or ions.
protons
1
1
1
2
electronic structure
2,8,8
2,8,8
2,8,8,1
2,8,8,2
neutrons
22
20
21
20
Which two particles belong to the same element?
A 1 and 2
B 1 an
C 2 and 3
D 2 and 4

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