JAMB - Chemistry (2003 - No. 6)
Neutral atoms of neon with atomic number 10 have the same number of electron as
O2+
Ca2+
K+
Mg2+
Explicació
Neutral atom of Ne has 10 electrons. Similarly, Mg\(^{2+}\) has 12 protons(atomic number) and 10 electrons because Mg\(^{2+}\) will donate or give out 2 electrons from the 12 and become reduced to 10 electrons. On the other hand, O\(^{2+}\), Ca\(^{2+}\), and K\(^+\) all have 6, 18 and 18 electrons respectively.