If an atom has electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2$,it will be placed in :-

Which of the following rules must be followed to form an alloy?

Which of the following electronic configurations of a metal atom represents the highest oxidation state?

Transition metals are related to which block?

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A):$ $Cu^{2+}$ in water is more stable than $Cu^{+}$.
Reason $(R):$ Enthalpy of hydration for $Cu^{2+}$ is much less than that of $Cu^{+}$.
In the light of the above statements,choose the correct answer from the options given below:

Identify the element for which the electronic configuration in the $+3$ oxidation state is $[Ar] 3d^5$: