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The best evidence that electrons are arr...

The best evidence that electrons are arranged in definite orbits or energy levels is based on the observation that

A

Atomic spectra consist of discrete lines and not continuous bands

B

Electrons in the beta ray have high kinetic energy

C

The penetrating power of cathode ray electrons depends upon the voltage used to produce them

D

Electrons revolve around the nucleus

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The correct Answer is:
A
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Knowledge Check

  • Molecular orbitals energy level diagram consists of

    A
    bonding molecular orbitals
    B
    antibonding molecular orbitals
    C
    nonbonding molecular orbitals
    D
    molecular orbitals in order of increasing energy

  • An electron is excited to fourth energy level in an atom. It will

    A
    remain there permanently
    B
    come back to original state either in one or more jumps
    C
    come back to ground state in one jump
    D
    rise to higher energy levels.

  • When an electron drops from a higher energy level to a low energy level, then

    A
    Energy is emitted
    B
    Energy is absorbed
    C
    Atomic number increases
    D
    Atomic number decreases

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