21. Spectroscopy and E=mc2

21. Spectroscopy and E=mc2

By Victoria Vercammen

Same as last class

Work on your own, as if I was in class​

THIS IS NOT OPTIONAL!!​

Take notes and answer all the questions. You can do this as many times as you want. This is the last topic this year. We'll start reviewing for the ACP next class

​Light source (white light from the sun, photons)

​hydrogen atom with one electron

Multiple Select

When an atom emits a photon, which of the following happen? (Check all that apply)

• The energy of the photon is the same as the difference between energy levels

• An electron goes from a higher excited level to a lower energy level

• An electron goes from a lower energy state to an excited state

• We call this radioactive decay

Multiple Choice

The emission spectrum is produced when

• electrons release energy as they move to their excited state.

• electrons absorb energy as they move to their excited state.

• electrons release energy as they return to the ground state.

• electrons absorb energy as they return to the ground state.

Multiple Choice

Emission of light/photon from an atom occurs when an electron

• drops from a higher to a lower energy level.

• jumps from a lower to a higher energy level.

• moves within its atomic orbital.

• falls into the nucleus.

Multiple Choice

The Sun converts mass to energy at such a rate that it produces 3.9x10²⁶ J every single second. How much mass is converted every second to produce this much energy?

• 1.3 x 10¹⁸ kg

• 1.17 x 10³⁵ kg

• 3.51 x 10⁴³ kg

• 4.33 x 10⁹ kg

Multiple Choice

The energy equivalent of 5.0 × 10^-3 kilogram is

• 4.5 x 10¹⁴ J

• 1.37 x 10¹⁴ J

• 2.25 x10¹⁶ J

• 2.34 x 10¹⁵ J

Multiple Choice

What total mass must be converted into energy to produce a gamma photon with an energy of 1.03 × 10^-13 joule?

• 1.14 x 10^-30 kg

• 9 x 10¹⁶ kg

• 1.8 x 10¹² kg

• 2.34 x 10¹⁵ kg

Multiple Choice

What is happening if the electron moves from position 1 to 2?

• Photon emission

• Photon absorption

• The electron will become less excited

• The electron will decrease a quantum

Multiple Choice

What happens when a high frequency light interacts with an atom?

• The electrons become excited and increase their energy state

• The electrons become excited and move towards the ground state

• The electrons emit light

• Cannot be determined

Multiple Choice

Which position represents the highest energy state?

• 1

• 2

• 3

• 4

Multiple Choice

The electron moves from position 1 to 2. How does the state of the electron shift during this reaction?

• The electron becomes less excited.

• The electron returns to the ground state.

• The electron becomes more excited.

• Light is emitted

Multiple Choice

For an electron to change from ground state to an excited stated it must...

• Absorb energy
• Release energy

Multiple Choice

What happens when an atom absorbs light?

• photons take in electron energy and jump to a higher energy level

• electrons take in photon energy and jump to a higher energy level

• electrons release photon energy when falling to a lower energy level

• photons release electron energy when falling to a lower energy level

Multiple Choice

According to the Bohr model, which process explains how atoms give off radiation that forms their characteristic spectra?

• Radiation is given off when electrons jump from a lower orbit to a higher orbit and photon energy equals E₂ – E₁.

• Radiation is given off when electrons jump from a lower orbit to a higher orbit and photon energy is less than E₂ – E₁.

• Radiation is given off when electrons jump from a higher orbit to a lower orbit and photon energy is greater than E₂ – E₁.

• Radiation is given off when electrons jump from a higher orbit to a lower orbit and photon energy equals E₂ – E₁.

Multiple Choice

What causes bright lines on an emission spectrum?

• electrons jumping to higher energy levels when absorbing colored photons

• electrons falling to lower energy levels, releasing colored photons

• protons jumping to higher energy levels when absorbing colored photons

• protons falling to lower energy levels, releasing colored photons