The Modern Periodic Law states that properties of elements are a periodic function of their:
AAtomic mass
BAtomic number (Moseley, 1913)
CNumber of neutrons
DValency
Question 2
Elements in the same PERIOD have the same:
ANumber of valence electrons
BNumber of occupied electron shells
CAtomic mass
DChemical properties
Question 3
Elements in the same GROUP have similar properties because they have:
ASame atomic mass
BSame number of neutrons
CSame number of valence electrons
DSame atomic radius
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