Chemistry > 2008 > 8
WASSCE
Consider the following elements and their electronic configurations
W: 1s2 2s2
X: 1s2 2s2 2p6
Y: 1s2 2s2 2p6 3s2
Z: 1S2 2s2 2p6 3s2 3p2
Which of the elements belong to the same group in the period table?
W: 1s2 2s2
X: 1s2 2s2 2p6
Y: 1s2 2s2 2p6 3s2
Z: 1S2 2s2 2p6 3s2 3p2
Which of the elements belong to the same group in the period table?
A.
W and X only
B.
Y and Z only
C.
W and Y only
D.
W, Y and Z only
Answer: C
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