Q: Bohr Magneton value in S.I. Units is:

1 Bohr Magneton = 9.273\times 10^{-24} JT^{-1}

Question 1

According to Bohr hypothesis, discrete quantity is

Accepted Answer

Bohr's hypothesis:1) Electrons revolves round the nucleus in water orbits.2) Orbit of the electron around the nucleus can take only some special values of radius.3) The energy of the atom as a definite value in these orbits.4) In this Orbits, Angular momentum (e) of the electron is integral multiple of the plank's constant h divided by  2n  i.e.  l = n \dfrac{h}{2n} .

Question 2

Bohr Magneton value in S.I. Units is:

Accepted Answer

1 Bohr Magneton =  9.273	imes 10^{-24} JT^{-1}

Question 3

According to Aufbau principle, the electron has a tendency to occupy that sub-shell which has:

Accepted Answer

The Aufbau principle states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels (e.g., 1s before 2s). In this way, the electrons of an atom or ion form the most stable electron configuration possible.

Question 4

The maximum number of electrons that can be filled into all the orbitals corresponding to the azimuthal quantum number  l  = 3, is:

Accepted Answer

For  l=3 , possible values of  m=2l+1=7 . For each m, there can be 2 electrons filled.Maximum number of electrons, thus  =2 	imes 7=14 .

Question 5

The main defect of Bohr's atom model is :

Accepted Answer

Bohr's model can only clearly explain hydrogen or hydrogen-like atoms, it fails when applied to larger and heavier atoms like iron, gold, mercury, etc.

Question 6

Bohrs atomic model assumes :

Accepted Answer

Bohr's Assumption :( i )  Electron in atoms orbit the nucleus.( ii ) Electron in a quantized orbit will not radiate energy.( iii ) Electrons can only gain and lose energy by jumping from one allowed orbit to other. He also assumed one of the postulates of Rutherford's atomic model, that is, the mass of the nucleus is very large compared to that of the electrons and hence assumed to be infinite

Question 7

The electrons are filled in various sub levels according to the order of their energies, is known as:

Accepted Answer

The order of filling of orbitals from lower energy to higher energy is explained by the Aufbau's principle and the  n+l  rule.

Question 8

In the lowest energy level of hydrogen atom, electron has an angular momentum equal to:

Accepted Answer

The angular momentum  L   =m_{e}vr  is on integer multiple of  \dfrac{h}{2\pi } mvr=\dfrac{nh}{2\pi}  For,  n=1 mvr=\dfrac{h}{2\pi}

Question 9

The energy of a hydrogen atom in the ground state is  13.6 eV. The energy of He+ ion in the first excited state will be

Accepted Answer

Question 10

The valence electrons of magnesium is different in ........... quantum number.

Accepted Answer

The configuration of magnesium is  1s^2\ 2s^2\ 2p^6\ 3s^2 .The outermost electron is in s orbital and is paired.Therefore, for the two electrons in 3s orbital, only s, spin quantum number is different.

Structure Of Atom

Chemistry
1257 Views

According to Bohr hypothesis, discrete quantity is

Bohr Magneton value in S.I. Units is:

According to Aufbau principle, the electron has a tendency to occupy that sub-shell which has:

The maximum number of electrons that can be filled into all the orbitals corresponding to the azimuthal quantum number $l$ = 3, is:

The main defect of Bohr's atom model is :

Bohrs atomic model assumes :

The electrons are filled in various sub levels according to the order of their energies, is known as:

In the lowest energy level of hydrogen atom, electron has an angular momentum equal to:

The energy of a hydrogen atom in the ground state is 13.6 eV. The energy of He+ ion in the first excited state will be

The valence electrons of magnesium is different in ........... quantum number.

Structure Of Atom

Chemistry 1257 Views

According to Bohr hypothesis, discrete quantity is

Bohr Magneton value in S.I. Units is:

According to Aufbau principle, the electron has a tendency to occupy that sub-shell which has:

The maximum number of electrons that can be filled into all the orbitals corresponding to the azimuthal quantum number l = 3, is:

The main defect of Bohr's atom model is :

Bohrs atomic model assumes :

The electrons are filled in various sub levels according to the order of their energies, is known as:

In the lowest energy level of hydrogen atom, electron has an angular momentum equal to:

The energy of a hydrogen atom in the ground state is 13.6 eV. The energy of He+ ion in the first excited state will be

The valence electrons of magnesium is different in ........... quantum number.

Chemistry
1257 Views

The maximum number of electrons that can be filled into all the orbitals corresponding to the azimuthal quantum number $l$ = 3, is: