Question

Which of the following pairs has almost same colour?

• A. ${}_{60}N{d}^{3+},{}_{69}T{m}^{3+}$
• B. ${}_{70}Y{b}^{3+},{}_{59}P{r}^{3+}$
• C. ${}_{63}E{u}^{3+},{}_{67}T{b}^{3+}$
• D. ${}_{64}G{d}^{3+},{}_{67}H{o}^{3+}$

Answer 1

The correct option is C ${}_{63}E{u}^{3+},{}_{67}T{b}^{3+}$

$E{u}^{3+}$ and $T{b}^{3+}$ have the same colour