Understanding Energy Levels in Gas Atoms

What is the fundamental rule about electron energy levels in atoms?

• Electrons can only have positive energy levels.

• Electrons can have energy levels between two states.

• Electrons can only have specific energy levels.

• Electrons can have any energy level.

Why are the energy levels of electrons in atoms negative?

• Because energy is released when electrons are added.

• Because electrons are negatively charged.

• Because external energy is needed to remove an electron.

• Because electrons are at a higher energy state.

What happens when an electron reaches zero energy level?

• It becomes part of the nucleus.

• It remains in the same state.

• It gains energy and moves to a higher level.

• It is ionized and leaves the atom.

What is the ground state of an electron?

• The state with the highest energy.

• The state with positive energy.

• The state with the most negative energy.

• The state with zero energy.

What occurs when an electron in the ground state absorbs a photon?

• It moves to a higher energy level.

• It releases another photon.

• It moves to a lower energy level.

• It remains in the ground state.

What is the relationship between energy change and photon emission?

• Energy change is greater than the energy of the emitted photon.

• Energy change is less than the energy of the emitted photon.

• Energy change is equal to the energy of the emitted photon.

• Energy change is unrelated to photon emission.

Which formula represents the energy of a photon?

• E = hf

• E = mv^2

• E = mc^2

• E = kT

How do you convert energy from electron volts to joules?

• Multiply by Avogadro's number.

• Multiply by the elementary charge.

• Multiply by Planck's constant.

• Multiply by the speed of light.

What is the frequency of a photon if the energy change is 10.2 eV?

• 1.60 x 10^-19 Hz

• 6.63 x 10^-34 Hz

• 3.00 x 10^8 Hz

• 2.46 x 10^15 Hz

What constant is used in the formula E = hf?

• Boltzmann constant

• Gravitational constant

• Planck's constant

• Speed of light