2. When an atom is in its ‘ground state’ Question 2 options: A) All the electron

Question

2. When an atom is in its ‘ground state’

Question 2 options: A) All the electrons are occupying the same lowest energy state B) The atom is located on the ground C) The electrons are located inside the nucleus D) All the electrons are occupying the lowest energy states of the atom, with a max. of 2 electrons per state E) Something else

3. When an atom is in an ‘excited state’

Question 3 options: A) All electrons are in a higher energy state than in the ground state B) The lowest energy electron state is not occupied C) Usually just one electron is in a higher energy state than in the ground state. The other electrons remain in their ground state arrangement. D) All the electrons have enough energy to escape from the attractive positively charged nucleus E) Something else

4. Atoms can get excited in the following ways:

Question 4 options: A) Getting bashed by a high speed electron B) Absorbing a photon with energy that matches an electron transition between allowed energy states C) Absorbing a photon of any energy D) A and C E) A and B

5. When an electron makes a transition (up or down) between energy levels in an atom,

Question 5 options: A) Energy is never conserved B) Energy is always conserved C) Energy is sometimes conserved 6.When an electron makes a transition in an atom from a higher energy state to a lower one,

Question 6 options: A) One photon is emitted with energy less than or equal to the energy difference between the 2 states. The Rest of energy becomes heat. B) Several photons are emitted. Their energies add up to the energy between the 2 states C) Photon energy unrelated to electron transition, instead depends on how the atom got excited in the first place D) One photon is emitted with energy exactly equal to the energy difference between the 2 states E) Depends on other transitions occurring in the atoms at the same time. Sometimes the energy from several different transitions combines to make a single high energy photon

Explanation / Answer

2)
D) All the electrons are occupying the lowest energy states of the atom, with a max. of 2 electrons per state.
This is according to Fermi's principle

3)
C) Usually just one electron is in a higher energy state than in the ground state.

4)
E) A and B

5)
B) Energy is always conserved

6)
D) One photon is emitted with energy exactly equal to the energy difference between the 2 states

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