Modern periodic table has been divided in ___________ blocks?
Correct answer: B. 4
- A. 2
- B. 4
- C. 8
- D. 7
Explanation
The modern periodic table is divided into s, p, d, and f blocks according to the subshell receiving the differentiating electron, giving four blocks. Students often choose d, seven, by confusing blocks with periods, of which the periodic table has seven.
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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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