chapter 1 quiz 2

When an electron absorbs a quantum of energy, it will transfer to….

• all higher energy levels.

• the lower energy level.

• the higher energy level corresponding to the absorbed energy.

• the lower energy level that agrees with the absorbed quantum.

When the electrons of an excited atom return to their original energy levels……….are / is emitte

• alpha-particles

• beta- particles

• energy in the form of line spectra

• gama-rays

Which of the following statements is incorrect ?

• the line spectrum of hydrogen atom are similar in colour and energy

• the line spectrum of hydrogen atom are different in colour and similar in energy

• the line spectrum of hydrogen atom are formed when the electron move between two energy levels

• the line spectrum of hydrogen atom are similar in colour and different in energy

Which of the following is incorrect for the electron ? ..........

• electron in the low energy level absorbs energy to transfer to higher energy level.

• the amount of energy which is emitted from the excited electron equals the amount of energy which is absorbed by the same electron to reach the same state of excitement.

• the electron in the first energy level is only affect by the nuclear attraction force

• electron can absorb different quantums of energy.

which of the following devices could be used to differentiate between sodium and lithium metals

• light microscope

• electron microscope

• laser microscope

• spectroscope

When a photon of light with wavelength 486 nm transfers from an electron in the principal level (n = 4) in hydrogen atom, this electron transfers to the principal level .......... .

• 1

• 2

• 6

• 5

to transfer an electron from 2nd energy level to the 4th energy level it should absorb..........

• quantum

• 1/2 quantum

• 2 quantums

• 3 quantums

The difference in energy between M, N levels is less than that between…….. levels.

• O, N

• P, O

• L, K

• no correct answer

The difference between any two successive energy levels …………

• increases as we go further from nucleus.

• decreases as we go further from the nucleus.

• is equal.

• there is no relation between them

The atom which absorbs the maximum energy to transfers an electron is from

• energy level (n = 7) to energy level (n = 1)

• energy level (n = 2) to energy level (n = 3)

• energy level (n = 2) to energy level (n = 1)

• energy level (n = 3) to energy level (n = 4)