General Science Chemistry Periodic Table

ପରମାଣୁ ସଂଖ୍ୟାର ନିମ୍ନଲିଖିତ ଯୁଗଳ ମଧ୍ୟରୁ କେଉଁଟି ସମାନ ଗ୍ରୁପ ର ଉପାଦାନଗୁଡ଼ିକୁ ପ୍ରତିନିଧିତ୍ୱ କରେ-

1

11, 20

2

12, 30

3

13, 31

4

14, 33

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