Answer: Group 1A, Period 6
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Answer:
Period 6 Group 1A
Explanation:
All the elements are arranged in the periodic table , according to their atomic number ,
The element given in the question is Cesium ( Cs ) , the number of valence electrons , i.e. , the number of electrons in the last shell of the atom , is equal to 1 .
hence , it corresponds to the group 1A , and the period 6 .