Related Problems with Solution
Problem 2 : Explain the trends in atomic size as you move down a group and from left to right across a period in the periodic table.
Solution :
- Down a group (vertical): Atomic size increases because the number of energy levels (shells) increases.
- Across a period (horizontal): Atomic size decreases because the effective nuclear charge (positive charge experienced by the outermost electrons) increases, pulling the electrons closer to the nucleus.
