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Which of the following statements is true about the periodic table?

26. Which of the following statements is true about the periodic table?

1. Elements in the same group have different valence electron configurations but the same chemical properties
2. Elements in the same group have the same valence electron configuration but different chemical properties
3. Elements in the same group have different valence electron configurations and different chemical properties
4. Elements in the same group have the same valence electron configuration and the same chemical properties

Answer

The correct answer is: D) Elements in the same group have the same valence electron configuration and the same chemical properties

Explanation

Elements in the same group have the same valence electron configuration and the same chemical properties because their outermost energy level has the same number of electrons.