Which of the following species have the same number of outer electrons? The letters do not represent symbols of elements.
W: \( {}_{12}W^{2+} \)
X: \( {}_{16}X \)
Y: \( {}_{21}Y^{2+} \)
Z: \( {}_{9}Z^{-} \)
Which of the following species have the same number of outer electrons? The letters do not represent symbols of elements.
W: \( {}_{12}W^{2+} \)
X: \( {}_{16}X \)
Y: \( {}_{21}Y^{2+} \)
Z: \( {}_{9}Z^{-} \)