CHEM BRAIN

In a given atom no two electrons can have the same values for all the four quantum numbers. This is called [BHU 1979; A MU 1983; EAMCET 1980, 83; MA DT Bihar 1980; CPMT 1986, 90, 92; NCERT 1978, 84; RPMT 1997; CBSE PMT 1991; MP PET 1986, 99]

Electron enters the sub-shell for which (n + l) value is minimum. This is enunciated as [RPMT 2000]

When 6d orbital is filled, the entering electron goes into? MDCAT2023

Electron occupies the available orbital singly before pairing in any one orbital occurs, it is [CBSE PMT 1991] 

It is impossible for two electrons to have same value of spin quantum number in the same orbital, according to NUMS2021

Aufbau principle is not satisfied by [MP PMT 1997]

Pauli's exclusion principle states that [CPMT 1983, 84]

. Electron enters the sub-shell for which (n = l) value is minimum. This is enunciated as [RPMT 2000]

The atomic orbitals are progressiv ely filled in order of increasing energy . This principle is called as[MP PET 2001]

Krypton (³⁶Kr) has the electronic configuration [₁₈Ar] 4s² ,3d¹⁰ ,4p⁶ . The 37th electron will go into which one of the following sub-levels [CBSE PMT 1989; CPMT 1989; EAMCET 1991]

There are four orbitals s, p, d and f. which order is correct with respect to the increasing energy of the orbitals MDCAT2015

Correct order of energy in the given subshell is; MDCAT2013

The relative energies of 4s,4p,and 3d orbitals are in the order MDCAT2012

The explanation for the presence of three unpaired electrons in the nitrogen atom can be giv en by  ETEA2012-08 Eng[NCERT 1979; RPMT 1999; DCE 1999, 2002; CPMT 2001; MP PMT 2002; Pb. PMT / CET 2002]

In a given atom no two electrons can have the same values for all the four quantum numbers. This is called [BHU 1979; A MU 1983; EAMCET 1980, 83; MA DT Bihar 1980; CPMT 1986, 90, 92; NCERT 1978, 84; RPMT 1997; CBSE PMT 1991; MP PET 1986, 99]

The order of energy level in ³⁹K is NUMS2019

4d, 5p, 5f, and 6p orbitals are arranged in the order of decreasing energy . The correct option is (NEET2019)