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- Electronic configuration of an atom is 2,8,1. Which of the following elements is similar with it in chemical reactivity?
. Electronic configuration of an atom is 2,8,1. Which of the following elements is similar with it in chemical reactivity?
a. K
b. CI
C. n
D. Ar
Best Answer
Ans: a
Sol: Electronic configuration 2,8,1 is of sodium.
Potassium (K) and sodium (Na) both belong to the same group or the first group known as alkaline metals and have similar chemical reactivity.
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