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
Explanation
Correct Option
bVideo Explanation
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Discussions (6)
paulo_pulisic
2 years ago
so this means that elements in the same group do not have the same number of electron shell
qvee
7 years ago
across the second period the elements are metallic (sodium, magnesium) vut as you move on the elements are gases eg chlorine
Maco2000
5 years ago
The ans should be B
If it were to be D it should be that the metallic properties of elements tend to decrease but since they said non metallic the ans is B
