Question

Select the statement that is true about quantum mechanics concepts.

Question 1 options:

A	An electron is free to choose any conceivable orbit around a hydrogen nucleus.
B	Although light is a wave, it also has particle properties.
C	Ultraviolet light is less energetic than visible light and interacts with molecules by causing bonds to vibrate.
D	When an electron falls from a high energy orbital around an atom to a low energy orbital, energy is absorbed.

Answer 1

A

An electron is free to choose any conceivable orbit around
a hydrogen nucleus. :FALSE

electron need particular amount of energy to occupy different orbitals. Each orbit have different energy

B

Although light is a wave, it also has particle properties.:TRUE

This is explained by De Broglie's matter wave concept.

C

Ultraviolet light is less energetic than visible light
and interacts with molecules by causing bonds to vibrate.:: FALSE

U.V rays have higher energy than visible light .So it is more powerful than
visible light

D

When an electron falls from a high energy orbital around
an atom to a low energy orbital, energy is absorbed. :: FALSE

Transition of electron from higher state to lower state involves release
of energy. The extra energy will be released