SK015 Chapter 2 Atomic Structure

Choose the FALSE statement of de Broglie postulate

• A. Used matter waves to describe the wave characteristics of material particles

• B. Characteristics wavelength of the electron depends on its mass and its velocity

• C. His hypothesis is applicable to hydrogen atom or any ion with 1 electron only

• D. Describe the dual nature of electron

Ionisation of hydrogen atom can be calculated by using the following method, EXCEPT

• A. Use the Rydberg expression where ni =1 and nf = ∞

• B. Use the convergence limit that can be found in the Balmer series

• C. Use the wavelength of the last line in the Lyman series

• D. Use the convergence limit of the uv spectrum

Which line spectrum can be found in ultra violet region?

• A. Lyman series

• B. Balmer series

• C. Paschen series

• D. Brackett series

Maximum number of electrons in a subshell with l = 3 and n = 4 is

• A. 10

• B. 12

• C. 14

• D. 16

The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is

• A. (5, 0, 0, +1/2)

• B. (5, 1, 0, +1/2)

• C. (5, 1, 1, +1/2)

• D. (6, 0, 0, +1/2)

6. When the azimuthal quantum number has the value of 2, the number of orbitals possible are

• A. 7

• B. 5

• C. 3

• D. 0

7. Which of the following statements in relation to the hydrogen atom is correct?

• A. 3s orbital is lower in energy than 3p orbital

• B. 3p orbital is lower in energy than 3d orbital

• C. 3s and 3p orbitals are of lower energy than 3d orbital

• D. 3s, 3p and 3d orbitals all have the same energy

8. Which of the following statements does not form a part of Bohr's model of hydrogen atom?

• A. Energy of the electrons in the orbit is quantised

• B. The electron in the orbit nearest the nucleus has the lowest energy

• C. Electrons revolve in different orbits around the nucleus

• D. The position and velocity of the electrons in the orbit cannot be determined simultaneously

9. Which of the following quantum number explain the orientation of orbital?

• A. Principle quantum number

• B. Angular momentum quantum number

• C. Magnetic quantum number

• D. Electron spin quantum number

10. Electrons are filled in orbitals according to the following order,

• A. 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p

• B. 1s, 2s, 2p, 3s, 3d, 4s, 3p, 4p

• C. 1s, 2s, 2p, 3s, 4s, 3p, 3d, 4p

• D. 1s, 2s, 2p, 3d, 3s, 3p, 4s, 4p