Which of the following questions is correct about the per...
Which of the following questions is correct about the periodic table?
The non-metallic properties of the elements tend to decrease across each period
The valence electrons of the elements increase progressively across the period
Elements in the same group have the same numbeer of electron shells
Elements in the same period have the number of valence electrons
Correct answer is B
No explanation has been provided for this answer.
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