Which of the following statements is correct about the periodic table?
- Elements in the same period have the same number of valence electrons
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The valence electrons of the elements in the same period increase progressively across the period
- Elements in the same group have the same number of electron shells
- The non-metallic Properties of the elements tend to decrease across each period
The correct answer is: B
Explanation
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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