Given that the electronic configuration of an element X is 1s22s22p63s 23p4, it can be...

Chemistry

WAEC 2000

Given that the electronic configuration of an element X is 1s22s22p63s 23p4, it can be deduced that X

A. belongs to group VI in the Periodic Table
B. belongs to periodic Table
C. contains 3 unpaired electrons in the ground state
D. has atomic number 27

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Correct Answer: Option A

Explanation

Adding up the electrons( numbers in the superscript) from the configuration, we have 2+2+6+2+4 = 16. The element with atomic number 16 is Sulphur and it's in group VI.

Alternatively, since the atomic number is 16, it can be deduced that we have 2, 8, 6 when arranged in shells or orbits. Because it the last digit is 6, thus the element belongs to group VI. Option A

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