Chemistry
JAMB 2018
Which of the following statements is correct about the periodic table?
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A.
Elements in the same period have the same number of valence electrons
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B.
The valence electrons of the elements in the same period increase progressively across the period
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C.
Elements in the same group have the same number of electron shells
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D.
The non-metallic Properties of the elements tend to decrease across each period
Correct Answer: Option 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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