Bohr's Atomic Model

Q.

Which among the following shell is at the highest energy level?

1. K
2. N
3. L
4. M

Q.

Select the correct statements that were proposed by Neils Bohr regarding the model of an atom.

1. All of these

2. The electron can have only certain energies, including a lowest-level ground state

3. Electrons emit energy as light when they move to lower energy orbits

4. Electrons absorb energy by moving to higher energy orbits.

Q. The energy of an electron _______ as long as it revolves in a particular shell.

1. increases
2. decreases
3. remains constant
4. fluctuates

Q. The energy of each orbit is:

1. fixed
2. keeps changing
3. energy is determined by momentum
4. sometimes fixed and sometimes changes

Q.

In Bohr's model of an atom, which letters are used to represent the orbits?

1. A, B, C, D

2. K, L, M, N

3. P, Q, R, S

4. W, X, Y, Z

Q. When an electrically charged particle is in motion it inevitably loses energy according to laws of mechanics and electrodynamics. In the case of atoms, electrons(charged particle) revolves(is in motion) around nucleus, why doesn't it lose energy and crash into nucleus?

Q.

Which of the following arrangements represent possible presentations of Bohr’s model of an atom correctly?

1. 

2. 

3. 

4. 

Q. In an atom two electrons move round the nucleus in circular orbits of radii r and 4r. The ratio of time taken by them to complete one revolution is -

Q. Time taken for an electrons to complete one revolution in Bohr orbit of hydrogen atom.

Q.

Which of the following have same electronic configuration ?

1. ${\mathrm{Na}}^{+},{\mathrm{Mg}}^{++}$

2. ${\mathrm{Mg}}^{2+},{\mathrm{Al}}^{3+},{\mathrm{Cl}}^{-}$

3. ${\mathrm{Cl}}^{-},{\mathrm{Na}}^{+}$

4. ${\mathrm{Na}}^{+},{\mathrm{Ca}}^{++},{\mathrm{Cl}}^{-}$

Q. In the bohrs orbit , what is the ratio of total kinetic energy to total energy of the electron??

Q. Which of the following statement is correct regarding Bohr's atomic model?

1. Energy of an electron is constant in a particular orbit.
2. Electrons move to lower energy orbits by absorbing energy.
3. Electrons revolve around the nucleus in elliptical orbits.
4. Electrons move to higher energy orbits by emitting energy.

Q. The maximum possible number of electrons in the outermost shell of an atom is:

1. 16
2. 18
3. 10
4. 8

Q. If the radius of second stationary orbit in bohrs atom is R , then the radius of 3rd orbit will be?

Q. The maximum possible number of electrons in the outermost shell of an atom is: