Spectra Year 13 Physics

With an atom, an electron with zero energy is...

• In the lowest energy level

• In the highest energy level

• Free from the atom

When an electron moves from a lower to a higher energy state, it is....

• excited

• transported

• raised

• lowered

Tags

NGSS.HS-PS1-4

NGSS.HS-PS4-3

An electron with the most negative value within an atom is known as the...

• ground state

• lowest electron

• negative state

• electron state

An atom has energy levels at E = -13.6 eV, -3.40 eV, and -1.51 eV. Which of these energies can a bound electron have?

• -13.6 eV

• -3.40 eV

• -1.51 eV

• -4.91 eV

• -6.80 eV

Why are do energy levels have negative values?

(Choose all true answers)

• Because external energy is required to free the electron

• Shows that electrons are trapped/bound within the atom

• Because electrons are negatively charged

• Because the maximum energy is minus infinity

When an electron moves from a higher to a lower energy level, which of these occurs?

• A photon is emitted

• A photon is absorbed

• An electron is emitted

• An electron is absorbed

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

An electron moves from energy level of -1.51eV to an energy level of -3.40 eV. What is the energy of the photon is emitted?

• 1.89 eV

• 1.51 eV

• 3.40 eV

• 4.91 eV

• No photon is emitted

What is the frequency of a 1.89 eV photon?

Give answer in Hz (don't include units), to 3 s.f., using e notation.

What is the wavelength of a 1.89 eV photon?

Give answer in m (don't include units), to 3 s.f., using e notation.

Which type of spectra is this?

• Continuous

• Emission

• Absorption