The atom with the electron configuration 1s22s22p63s23p63d104s24p4 is in?

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1s22s22p63s23p63d104s24p4

A. period 4, p- block
B. period 3, p- block
C. period 4, d- block
D. period 3, d- block

Correct Answer:

Option A – period 4, p- block

Explanation

Selenium is a chemical element with the symbol Se and atomic number 34. It is a non-metal

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