1.

The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively. (i) Which two elements belong to the same group? (ii) Which two elements belong to the same period? Give reasons for your choice.

Answer»

The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.

(i) Which two elements belong to the same group?

(ii) Which two elements belong to the same period?

Give reasons for your choice.



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