Physics · Chemistry

Radioactivity and Nuclear Physics

519 Questions

Radioactivity and nuclear physics encompass the study of radioactive decay processes, neutron to proton ratios, and nuclear medicine. Questions cover various detection mechanisms, including scintillation counters and neutrino telescopes. These concepts are frequently tested in advanced science and civil services examinations.

Radioactive decayNuclear medicineParticle detectionNeutrino telescopesCosmic ray detection

Radioactivity and Nuclear Physics Questions

Multiple choice

Which of the following is not a product of radioactive decay?

  1. positron

  2. alpha particle

  3. gamma ray

  4. electron cloud
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Radioactive decay involves changes to the nucleus of an atom. An electron cloud is the region surrounding the nucleus where electrons reside; it is not a product of nuclear decay.

Multiple choice

What is unique about the Lanthanides?

  1. Rare (only 0.01% abundance)

  2. They're radioactive

  3. Synthetically made
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lanthanides were historically called rare earth elements because they were difficult to isolate, even though some are relatively abundant in the Earth's crust.

Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which part of the human body is first adversely affected by nuclear radiation?

  1. Eyes

  2. Lungs

  3. Skin

  4. Bone marrow
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
On exposure to radiation burns the skin first and then other biological tissue. The radiation can be ultraviolet light and ionizing radiation that causes sunburn. High exposure to X-rays during diagnostic medical imaging or radiotherapy can also result in radiation burns. As the ionizing radiation interacts with cells within the body damaging them, the body responds to this damage, resulting in erythema i.e., redness around the damaged area. Radiation burns are often associated with radiation-induced cancer due to the ability of ionizing radiation to interact with and damage DNA, occasionally inducing a cell to become cancerous.
Therefore, the correct answer is option C.
Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Name the rays or waves produced by the changes in the nucleus of an atom.

  1. X-rays

  2. UV rays

  3. Gamma rays

  4. IR rays
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Gamma rays are classically produced by the decay of atomic nuclei as they transition from a high energy state to a lower state known as gamma decay, but may also be produced by other processes. Paul Villard, a French chemist and physicist, discovered gamma radiation in $1900$, while studying radiation emitted from radium. Villard's radiation was named "gamma rays" by Ernest Rutherford in $1903$.
Hence,  the rays or waves produced by the changes in the nucleus of an atom is Gamma rays.

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Radio isotope useful in treating blood cancer is

  1. Cobalt 40

  2. Carbon 60

  3. Cobalt 60

  4. Carbon 14
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cobalt therapy or cobalt $60$ therapy is the medical use of gamma rays from the radio isotope cobalt $-60$ to treat conditions such as cancer. Thus, Cobalt $-60$ is the radio isotope useful in treating the blood cancer.

Multiple choice

What is the name of the process by which a particle decays into two or more other particles?

  1. Annihilation

  2. Fusion

  3. Fission

  4. Radioactive Decay
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Radioactive decay is the process by which a particle decays into two or more other particles. This process is often accompanied by the emission of energy in the form of radiation.

Multiple choice

What is the primary source of neutrinos in the universe?

  1. Nuclear fusion in stars

  2. Radioactive decay

  3. Cosmic ray interactions

  4. Supernova explosions
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Supernova explosions produce an enormous number of neutrinos, which carry away a significant portion of the energy released during the explosion.

Multiple choice

Which physical phenomenon is responsible for the emission of light and other electromagnetic radiation from celestial objects?

  1. Nuclear Fusion

  2. Nuclear Fission

  3. Radioactive Decay

  4. Thermal Radiation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Thermal radiation is the emission of electromagnetic radiation due to the thermal energy of a material. It is a fundamental process that occurs in celestial objects, causing them to emit light and other forms of electromagnetic radiation.

Multiple choice

What is the term used to describe the spontaneous transformation of one element into another, accompanied by the emission of radiation?

  1. Radioactive Decay

  2. Nuclear Fission

  3. Nuclear Fusion

  4. Electron Capture
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, resulting in the transformation of one element into another.

Multiple choice

Which of the following is NOT a type of radioactive decay:

  1. Alpha Decay

  2. Beta Decay

  3. Gamma Decay

  4. Neutron Decay
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Neutron decay is not a type of radioactive decay. Alpha decay involves the emission of an alpha particle, beta decay involves the emission of a beta particle, and gamma decay involves the emission of a gamma ray.

Multiple choice

Which of the following is NOT a common application of radioisotopes in medicine?

  1. Cancer Treatment

  2. Medical Imaging

  3. Sterilization of Medical Devices

  4. Food Preservation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Food preservation is not a common application of radioisotopes in medicine. Radioisotopes are used in cancer treatment, medical imaging, and sterilization of medical devices.

Multiple choice

What is the term used to describe the study of the effects of radiation on biological systems?

  1. Radiation Biology

  2. Radioactive Decay

  3. Nuclear Fission

  4. Nuclear Fusion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Radiation biology is the study of the effects of radiation on biological systems.

Multiple choice

What is the primary mechanism for neutrino production in Active Galactic Nuclei?

  1. Nuclear Fusion

  2. Electron Capture

  3. Beta Decay

  4. Accretion Disk Processes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Neutrinos are produced in Active Galactic Nuclei primarily through accretion disk processes, where matter falls onto a supermassive black hole.

Multiple choice

What was the name of the element that was detected in the gamma-ray counterpart to the GW170817 event?

  1. Gold

  2. Platinum

  3. Uranium

  4. Plutonium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gold was detected in the gamma-ray counterpart to the GW170817 event.