Electrons

Open Ended

Why is the concept of energy levels important in understanding the arrangement of electrons in atoms?

Multiple Choice

According to Bohr's Theory, what happens to electrons in an atom when they absorb energy?

• They move to a higher energy orbit, further from the nucleus

• They move closer to the nucleus

• They lose energy and fall into the nucleus

• They remain in the same orbit

Multiple Choice

Which color of visible light has the highest energy and why?

• Violet, because it has the shortest wavelength and highest frequency.

• Red, because it has the longest wavelength.

• Green, because it is in the middle of the spectrum.

• Yellow, because it is brighter.

Multiple Select

Which of the following are true about electromagnetic radiation?

• It acts like a wave in space.

• It is only visible light.

• All forms create the electromagnetic spectrum.

• It cannot travel through a vacuum.

Fill in the Blank

The acronym Roy G. Biv helps us remember the colors of the visible spectrum in order from ___ to ___.

Open Ended

Explain how the wavelength and frequency of electromagnetic waves are related to the energy of the waves, using examples from the electromagnetic spectrum.

Open Ended

Describe a real-world example where understanding the relationship between wavelength and frequency is important.

Multiple Choice

What happens to the frequency and energy of a wave as its wavelength decreases?

• Both frequency and energy increase.

• Frequency increases but energy decreases.

• Both frequency and energy decrease.

• Frequency decreases but energy increases.

Multiple Choice

Which type of electromagnetic wave has the shortest wavelength?

• Radio waves

• Infrared

• Ultraviolet

• Gamma rays

Fill in the Blank

The unit for frequency is called the ___ (Hz or 1/sec).

Multiple Select

Which of the following are correct relationships or facts about the speed of light and electromagnetic waves?

• The speed of light is constant in a vacuum.

• Wavelength and frequency are directly proportional if speed is constant.

• The equation c = λf relates speed, wavelength, and frequency.

• Frequency is measured in Hertz (Hz).

Open Ended

Explain what happens to the frequency of an electromagnetic wave if its wavelength decreases, assuming the speed of light remains constant.

Multiple Choice

A certain yellow light has a frequency of 5.193 x 10^14 Hz. What is the first step you should take to find its wavelength?

• Multiply the frequency by the speed of light.

• Divide the speed of light by the frequency.

• Convert the frequency to meters.

• Add the speed of light and the frequency.

Fill in the Blank

The equation that relates the energy of a quantum to its frequency is E = ___ f.

Multiple Choice

Which of the following best describes Planck's Constant (h)?

• A fundamental constant of nature related to energy and frequency

• The energy of a photon in joules

• The frequency of a photon in hertz

• The speed of light in a vacuum

Open Ended

What is the energy of a photon of light with a frequency of 5.193 x 10^14 Hz?

Multiple Select

According to the Bohr model, which of the following statements are correct?

• Electrons circle the nucleus in certain paths called orbits or atomic energy levels

• Electrons can be found between orbits

• Electrons are higher in energy the farther away they are from the nucleus

• Electrons lose energy as they move to higher orbits

Multiple Choice

In the Bohr model, when an electron moves from a higher energy level (E3) to a lower energy level (E1), what happens?

• A photon is emitted with energy equal to E3 - E1

• A photon is absorbed with energy equal to E3 - E1

• The electron disappears

• The nucleus gains energy

Fill in the Blank

The Heisenberg uncertainty principle states that it is impossible to know both the exact ___ and the exact motion of an object at the same time.

Open Ended

How did Schrödinger's model of the atom differ from Bohr's model regarding the location of electrons?

Multiple Choice

What is an emission spectrum?

• A set of discrete wavelengths released by atoms

• A continuous range of wavelengths emitted by all substances

• A spectrum produced by absorption of energy

• A spectrum produced by reflection of light

Multiple Choice

Which element's emission spectrum contains the greatest number of visible lines according to the diagram?

• Hydrogen

• Sodium

• Neon

• Mercury

Open Ended

How can the emission spectra of elements be used in scientific research or practical applications?

Multiple Select

Which of the following statements about emission spectra are correct?

• Each element has a unique emission spectrum.

• Emission spectra are produced by electrons dropping to lower energy levels.

• All elements have the same emission spectrum.

• Emission spectra can be used to identify elements.

Fill in the Blank

The maximum number of electrons for an energy level can be calculated using the formula 2n^___.

Multiple Choice

If n = 3, what is the maximum number of electrons that can be present in that energy level?

• 6

• 8

• 18

• 32

Open Ended

How does the concept of energy levels in Bohr's Theory help explain the behavior of electrons in atoms?

Multiple Choice

According to Bohr's Theory, what happens when an electron in an atom absorbs energy?

• It moves to a lower energy orbit closer to the nucleus.

• It leaves the atom completely.

• It moves to a higher energy orbit further from the nucleus.

• It becomes a proton.