Chemistry > 2001 > 5
WASSCE
Element which belong to same group in the periodic table are charaterised by
A.
Difference of +1 in the oxidation number of successive member
B.
Presence of same number of outermost electrons in the respective atoms
C.
different of 14 atomic number mass unit between successive members
D.
presence of the same number of electron shells in the respective atoms
Answer: B
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