Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same___________________?
Correct answer: B. Both 'B' & 'C'
- A. Period increases
- B. Both 'B' & 'C'
- C. Group increases
- D. Period decreases
Explanation
Across a period, increasing nuclear charge pulls the electron cloud inward, so atomic size decreases. Down a group, additional electron shells are added, so atomic size increases, making both statements B and C correct.
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