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Electronic Structure of the Atom: MCQ1

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Questions and Answers

What is the definition of an energy level in an atom?

A region of inﬁnite energy within an atom that electrons can occupy

A region of deﬁnite energy within an atom that electrons can occupy (correct)

A region of deﬁnite energy within an atom that electrons cannot occupy

A region of zero energy within an atom that electrons cannot occupy

What is the purpose of a spectroscope?

To show the characteristic line spectrum of a mixture

To show the characteristic line spectrum of an element (correct)

To show the characteristic line spectrum of a solution

To show the characteristic line spectrum of a compound

What type of spectrum shows dark lines at specific wavelengths depending on the elements present?

Continuous Spectrum

Absorption Spectrum (correct)

Transmission Spectrum

Emission Spectrum

According to Niels Bohr's theory, what happens when an electron moves from a higher energy level to a lower energy level?

A deﬁnite amount of energy is emitted in the form of light Signup and view all the answers

What is the formula to calculate the difference in energy levels?

E2 - E1 = hf Signup and view all the answers

What series is associated with excited electrons falling back to n=2?

Balmer series Signup and view all the answers

What is used to measure the presence and amount of an element?

Atomic Absorption Spectrometer Signup and view all the answers

What colour flame is produced when barium is burned in a flame test?

Yellow / green Signup and view all the answers

What is the primary limitation of the Bohr theory?

It only worked well for hydrogen Signup and view all the answers

What is the Heisenberg uncertainty principle?

It is not possible to determine the exact position and velocity of an electron at the same time Signup and view all the answers

What is the region around the nucleus where the probability of finding an electron is relatively high?

Atomic orbital Signup and view all the answers

What is the Aufbau principle?

Electrons will occupy the lowest sublevel available Signup and view all the answers

What are energy levels?

Regions of definite energy within an atom that electrons can occupy Signup and view all the answers

What is an energy sublevel?

A group of atomic orbitals all of the same energy Signup and view all the answers

What is the primary reason why the Bohr theory did not account for the existence of orbitals?

It did not take into account the wave-particle duality of electrons Signup and view all the answers