An element with the electronic configuration 1s2 2s2 2p6 3s2 3p4 belongs to
Correct answer: A. group VI of the p block, period 3
- A. group VI of the p block, period 3
- B. group IV of the p block, period 3
- C. group II of the s block, period 3
- D. group VI of the d block, period 4
Explanation
The outermost shell is the third, giving period 3, and it contains six electrons in total across 3s and 3p, giving group VI, while the last electron entered a p subshell so the element is in the p block. The element is sulphur. Counting only the p electrons and answering group IV is the standard error.
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About Blocks of the Periodic Table
Electron configurations divide elements into s, p, d and f blocks according to the subshell receiving the last electron. Work includes the positions, valence-shell configurations and general properties of s-block and p-block elements, along with periodic trends in atomic size, ionisation energy, electron affinity and electronegativity.
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