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

  • A Elements in the same period have the same number of valence electrons
  • B The valence electrons of the elements in the same period increase progressively across the period
  • C Elements in the same group have the same number of electron shells
  • D The non-metallic Properties of the elements tend to decrease across each period
jamb 2018chemistry

The correct answer is B. The valence electrons of the elements in the same period increase progressively across the period

The valence electrons refer to the number of electrons in the outer shell. Across a period (horizontal row), the valence electron increases.

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