Question

2 Assertion: Each d-block series contains ten elements.
Reason: The maximum capacity of d-orbitals is of ten electrons as in each series d-orbitals are
gradually filled up.​

Answer 1

Answer:

assertion and reason both are correct and reason is the correct explanation of assertion

Explanation:

In transition elements, electrons enter the d orbital, which can hold a maximum of 10 electrons, hence only 10 elements in each row. This is because the d- sub-shell can occupy only 10 electrons since it has 5 orbitals