Worksheet: Electron Energy Levels

In this worksheet, we will practice determining whether an electron shell of an atom is filled and which electron transitions are possible in a given atom.

Q1:

The diagram shows a hydrogen atom. The electron shown transitions between two energy levels of the atom.

Which energy level is the electron initially in?

  • AThe first energy level
  • BThe fourth energy level
  • CThe second energy level
  • DThe third energy level

Which energy level does the electron transition to?

  • AThe first energy level
  • BThe third energy level
  • CThe fourth energy level
  • DThe second energy level

Q2:

The diagram shows a hydrogen atom. An electron, initially in the third energy level of the atom, transitions to the first energy level, emitting a particle at the same time. What kind of particle is emitted in this process?

  • AAn electron
  • BA neutrino
  • CA photon
  • DA proton
  • EA neutron

Q3:

The diagram shows an electrically neutral atom. If one of the electrons in the innermost shell were to absorb a photon and move into an excited state, which of the electron shells shown in the diagram could it move to?

  • AShell 2
  • BShell 3

Q4:

Each of the following diagrams shows a hydrogen atom that is initially in an excited state. In each case, the electron transitions from a higher energy level to a lower energy level, emitting a photon. For which case is the energy of the emitted photon the greatest?

  • A
  • B
  • C

Q5:

The diagram shows an electrically neutral neon atom. How many of the electrons in the atom are in excited states?

Q6:

The diagram shows electrons in different electron shells in an atom. The atom is electrically neutral. What element is this an atom of?

  • AHelium
  • BBoron
  • CHydrogen
  • DBeryllium
  • ELithium

Q7:

The diagram shows electrons in different electron shells in an atom. How many filled shells does the atom have?

Q8:

The diagram shows electrons in different electron shells in an atom.

How many electrons are there in the innermost shell?

How many electrons are there in the outermost shell?

How many electrons does the atom have in total?

Q9:

The diagram shows electrons in different electron shells in an atom. The outermost shell is unfilled. How many more electrons can the atom have in its outermost shell?

Q10:

The diagram shows electrons in different energy levels in an atom.

How many electrons are there in the first energy level?

How many electrons are there in the second energy level?

How many electrons does the atom have in total?

Q11:

The diagram shows electrons in different electron shells in an atom. The atom is electrically neutral. What element is this an atom of?

  • ANitrogen
  • BBeryllium
  • CCarbon
  • DBoron
  • EOxygen

Q12:

The diagram shows electrons in different electron shells in an atom. The atom is electrically charged and has one less electron in its outer shell than it would if it were electrically neutral. What element is this an atom of?

  • AAluminum
  • BSilicon
  • CNeon
  • DMagnesium
  • ESodium

Q13:

The diagram shows electrons in different electron shells in an atom. The atom is electrically charged and has one extra electron in its outer shell than it would if it were electrically neutral. What element is this an atom of?

  • ABoron
  • BOxygen
  • CFluorine
  • DNitrogen
  • ECarbon

Q14:

The diagram shows electrons in different electron shells in an atom. How many filled shells does the atom have?

Q15:

The diagram shows electrons in different electron shells in an atom. All of the first four electron shells in the atom are filled.

Which of the electron shells contains the most electrons?

  • AShell 1
  • BShell 4
  • CShell 2
  • DShell 3

Which of the electron shells contains the fewest electrons?

  • AShell 4
  • BShell 2
  • CShell 1
  • DShell 3

Q16:

The diagram shows electrons in different electron shells in an atom. The outermost shell is unfilled. How many more electrons can the atom have in its outermost shell?

Q17:

The diagram shows an electrically neutral helium atom. How many of the electrons in the atom are in excited states?

Q18:

The diagram shows a helium atom. One of the electrons in the first energy level absorbs a particle and moves to the second energy level. What kind of particle is absorbed in this process?

  • AAn electron
  • BA photon
  • CA neutrino
  • DA proton
  • EA neutron

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.