1.

Observe the given table and answer the following question:ElementsABCDEAtomic number1142719Identify the two elements that belong to the same period and the two elements that belong to the same group. Give reason for your conclusion.

Answer»

(i) Element B and element D are in same period because their atoms have two shells.

(ii) Element A and element E are in the same, group because their outermost shell has one electron.



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