The outer electronic configuration of an element "X"bis ns2 np2. It belongs to which group of periodic table:
Correct answer: B. 4th group
- A. 2nd group
- B. 4th group
- C. 3rd group
- D. 5th group
Explanation
The outer electronic configuration of element "X" is ns2 np2, indicating that it has 2 electrons in the s subshell and 2 electrons in the p subshell of its outermost energy level. Based on this configuration, element "X" belongs to the 4th group of the periodic table. In the periodic table, groups are organized based on the number of valence electrons, and the 4th group consists of elements with 4 valence electrons.
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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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