Assertion (A) : Ionisation potential of Be (atomic number `4` ) is than B (atomic number `5)`
Reason (R ) : The first electron released fromm Be is of p orbitals but that from B is of a orbitals.

Assertion (A) : Ionisation potential of Be (atomic number 4 ) is more than B (atomic number 5) Reason (R ) : The first electron released fromm Be is of p orbitals but that from B is of s orbitals.

Assertion: Ionisation potential of Be (atomic no.4) is less than B (atomic no.5). Reason: The first electron released from Be is of p-orbital but that from B is of s-orbital.

Assertion: Ionisation potential of Be (atomic no.4) is less than B (atomic no.5). Reason: The first electron released from Be is of p-orbital but that from B is of s-orbital.

Assertion (A) : The ionisation energy of N is more than that of O Reason (R ) : Electronic configuration of N is more stable due to half - fillied 2p orbitals

Assertion (A) : The ionisation energy of N is more than that of O Reason (R ) : Electronic configuration of N is more stable due to half - fillied 2p orbitals

Assertion (A) : In an atom, the velocity of electron in the higher orbits keeps on decreasing Reason (R ) : Velocity of electron in inversely proportional to the radius of the orbit

Assertion (A) : In an atom, the velocity of electron in the higher orbits keeps on decreasing Reason (R ) : Velocity of electron in inversely proportional to the radius of the orbit

First ionisation potential of C- atom is greater than that of B atom , where as the revers is true is for second ionisation potential.

The atomic number of an element is 35. What is the toal number of electrons present in all the p-orbitals of the ground state atom of that element?