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30-12-2020
Chemistry

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What are 1a 3b and 7a explains on the periodic cable

Respuesta :

31-12-2020

Answer:

Explanation:

1a=group 1 elements(H,Li,Na,K....)

3b=group 3 elements (Sc,Y,La....)

7a=group 17 elements (F,Cl,Br,I....)

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