Physics Quiz Over Electromagnetic Radiation
Electromagnetic energy is basically all the energy released into space by any object including the sun. The different ways in which the energy travels through space is electromagnetic radiation. The quiz below is designed to test your understanding of electromagnetic radiation. Take it up and share your score in the comment section.
Questions and Answers
- 1.
What are some examples of Electromagnetic Radiation?
- A.
X-rays, microwaves, water, sunlight
- B.
X-rays, sound, sunlight, microwaves
- C.
X-rays, sunlight, microwaves, radiant heat
- D.
X-rays, water, sunlight, sound
Correct Answer
C. X-rays, sunlight, microwaves, radiant heat -
- 2.
What is wavelength?
- A.
The height of a wave
- B.
The number of waves per second
- C.
The distance between two waves
- D.
Hertz
Correct Answer
C. The distance between two wavesExplanation
Wavelength refers to the distance between two consecutive points on a wave that are in phase, such as two crests or two troughs. It is a fundamental property of waves and is usually represented by the Greek letter lambda (λ). The height of a wave refers to its amplitude, the number of waves per second is the frequency, and Hertz is the unit used to measure frequency.Rate this question:
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- 3.
What is frequency (wave)
- A.
The height of a wave
- B.
The distance between two waves
- C.
The number of waves per second
- D.
The speed of light
Correct Answer
C. The number of waves per secondExplanation
Frequency refers to the number of waves that pass a given point in a specific time period. It is a measurement of how often a wave repeats itself. In the context of this question, frequency specifically refers to the number of waves per second. The height of a wave, the distance between two waves, and the speed of light are not accurate definitions of frequency.Rate this question:
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- 4.
How many orbitals in a p subshell?
- A.
1
- B.
3
- C.
6
- D.
10
Correct Answer
B. 3Explanation
The p subshell consists of three orbitals, namely px, py, and pz. Each orbital can hold a maximum of 2 electrons, resulting in a total of 6 electrons that can be accommodated in the p subshell. Therefore, the correct answer is 3.Rate this question:
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- 5.
What are the subshells?
- A.
S, p, d, e
- B.
S, p, d, f
- C.
A, b, c, d
- D.
None of the above
Correct Answer
B. S, p, d, fExplanation
The subshells in an atom represent the different energy levels or orbitals within each principal energy level. The letters s, p, d, and f correspond to the different subshells. The s subshell can hold a maximum of 2 electrons, the p subshell can hold a maximum of 6 electrons, the d subshell can hold a maximum of 10 electrons, and the f subshell can hold a maximum of 14 electrons. Therefore, the correct answer is s, p, d, f.Rate this question:
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- 6.
In the bohr model electrons are shown as
- A.
Particles
- B.
Waves
- C.
-
- D.
+
Correct Answer
A. ParticlesExplanation
The Bohr model represents electrons as particles. In this model, electrons are depicted as discrete entities with specific positions and orbits around the nucleus. This model was proposed by Niels Bohr in 1913 and was based on the idea that electrons occupy specific energy levels or shells. The particle nature of electrons in the Bohr model explains their discrete energy levels and the stability of atoms.Rate this question:
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- 7.
Modern atomic theory thinks of electrons as
- A.
Particles
- B.
Waves
- C.
Both particles and waves
- D.
None of the above
Correct Answer
C. Both particles and wavesExplanation
Modern atomic theory views electrons as both particles and waves. This is based on the concept of wave-particle duality, which suggests that particles like electrons can exhibit both wave-like and particle-like behavior. This is supported by experiments such as the double-slit experiment, where electrons behave as waves when passing through a double slit and create an interference pattern. However, electrons also exhibit particle-like properties, such as having a definite mass and charge, and interacting with other particles in a particle-like manner. Therefore, the correct answer is both particles and waves.Rate this question:
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- 8.
The ground state is when electrons are
- A.
Filling the lowest orbitals
- B.
Are bumped to a higher orbital
- C.
When they are excited
- D.
None of the above
Correct Answer
A. Filling the lowest orbitalsExplanation
The ground state refers to the lowest energy state that an electron can occupy in an atom. In this state, electrons are filling the lowest energy orbitals available to them. This means that they are occupying the orbitals closest to the nucleus before moving to higher energy levels. When electrons are excited, they gain energy and can be bumped to a higher orbital, but this is not the ground state. Therefore, the correct answer is "filling the lowest orbitals."Rate this question:
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- 9.
The excited state is when electrons are
- A.
Filling the lowest orbitals
- B.
Are bumped to a higher orbital
- C.
Are excited
- D.
None of the above
Correct Answer
B. Are bumped to a higher orbitalExplanation
When electrons in an atom are in their ground state, they occupy the lowest energy orbitals. However, when these electrons absorb energy, they become excited and move to higher energy orbitals. This movement of electrons to higher orbitals is known as "bumping" or "jumping" to a higher orbital. Therefore, the correct answer is "are bumped to a higher orbital".Rate this question:
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- 10.
The orbital diagram for O(Z=8) is
- A.
1s2,2s2,3s2,2p2
- B.
1s2,2s2,2p2,3s2
- C.
1s2,2s2,2p4
- D.
1s2,2s2,2p6
Correct Answer
C. 1s2,2s2,2p4Explanation
The correct answer is 1s2,2s2,2p4. This is the correct orbital diagram for oxygen (O) with atomic number 8. The first energy level (n=1) has 2 electrons in the 1s orbital. The second energy level (n=2) has 2 electrons in the 2s orbital. The remaining 4 electrons are in the 2p orbital, with 2 electrons in one of the 2p orbitals and the other 2 electrons in another 2p orbital. This arrangement follows the Aufbau principle and the Pauli exclusion principle, which govern the filling of electron orbitals.Rate this question:
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- 11.
The orbital diagram for O(Z=8)
- A.
[/\\/] [/\\/] [/\\/][/\ ][/\ ]
- B.
[/\/\] [/\/\] [/\/\][/\ ][/\ ]
- C.
[/\\/] [/\\/] [/\\/][/\\/][ ]
- D.
None of the above
Correct Answer
A. [/\\/] [/\\/] [/\\/][/\ ][/\ ]Explanation
The orbital diagram represents the arrangement of electrons in the energy levels of an atom. In this case, the orbital diagram shows the electron configuration for oxygen (Z=8). Each line or box represents an orbital, and the arrows represent the electrons. The diagram shows that oxygen has two electrons in the 1s orbital, two electrons in the 2s orbital, and four electrons in the 2p orbital. This arrangement follows the Aufbau principle and the Pauli exclusion principle, which govern the filling of electron orbitals.Rate this question:
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- 12.
Valence electrons
- A.
Inner most electrons
- B.
Electrons in the outermost level
- C.
Excited electrons
- D.
None of the above
Correct Answer
B. Electrons in the outermost levelExplanation
Valence electrons are the electrons in the outermost energy level of an atom. These electrons are responsible for the chemical properties and reactions of the atom. The inner most electrons are located in the inner energy levels and do not participate in chemical bonding. Excited electrons are electrons that have absorbed energy and moved to a higher energy level. Therefore, the correct answer is "electrons in the outermost level" as they are the valence electrons.Rate this question:
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