Question: What Is Radioactivity Explain?

What is radioactivity simple explanation?

Radioactivity is the spontaneous emission of radiation in the form of particles or high energy photons resulting from a nuclear reaction.

A substance that contains unstable atomic nuclei is considered to be radioactive.

Radioactive decay is a random or stochastic process that occurs at the level of individual atoms..

How many did Chernobyl kill?

The Union of Concerned Scientists estimates between 4,000 and 27,000 people died as a result of the disaster, where as Greenpeach places the figure much higher at between 93,000 and 200,000. Many people living hundreds of miles from the explosion site fell ill with illnesses in the aftermath of the disaster.

What does half life mean?

Half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive …

Can radioactivity spread?

Radiation cannot be spread from person to person. Small quantities of radioactive materials occur naturally in the air, drinking water, food and our own bodies. People also can come into contact with radiation through medical procedures, such as X-rays and some cancer treatments.

What are the applications of radioactivity?

Radioactivity has several practical applications, including tracers, medical applications, dating once-living objects, and preservation of food.

Who invented radioactivity?

Henri BecquerelAlthough it was Henri Becquerel that discovered the phenomenon, it was his doctoral student, Marie Curie, who named it: radioactivity. She would go on to do much more pioneering work with radioactive materials, including the discovery of additional radioactive elements: thorium, polonium, and radium.

What is radioactivity in Kid definition?

Radioactivity is simply when very small particles in objects emit energy or smaller particles. The energy that is produced can result in cancer, serious environmental damage, or helpful technologies. There are different degrees of radioactivity, and different exposures increase the harm it can cause.

Can phone radiation kill you?

The bulk of scientific evidence says that cellphone radiation doesn’t harm humans, according to the Food and Drug Administration: our cellphones are much more likely to kill us when we glance down at them while driving. But people are bad at judging risk.

How can radioactivity be dangerous?

Exposure to very high levels of radiation, such as being close to an atomic blast, can cause acute health effects such as skin burns and acute radiation syndrome (“radiation sickness”). It can also result in long-term health effects such as cancer and cardiovascular disease.

How can radioactivity be detected?

Radiation cannot be detected by human senses. A variety of instruments are available for detecting and measuring radiation. The most common type of radiation detector is a Geiger-Mueller (GM) tube, also called a Geiger counter.

What is difference between radiation and radioactivity?

What’s the difference between radioactivity and radiation? As we have seen, radioactive decay is a property of a particular nucleus. In comparison, radiation is a possible consequence of many processes, not just radioactivity. … non-ionising radiation: essentially the low-energy parts of the electromagnetic spectrum.

What is the main cause of radioactivity?

What causes atoms to be radioactive? … Instability of an atom’s nucleus may result from an excess of either neutrons or protons. A radioactive atom will attempt to reach stability by ejecting nucleons (protons or neutrons), as well as other particles, or by releasing energy in other forms.

What is radioactivity and its types?

Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. … The most common types of radiation are called alpha, beta, and gamma radiation, but there are several other varieties of radioactive decay.

What are the 3 types of radioactivity?

There are three primary types of radiation:Alpha – these are fast moving helium atoms. … Beta – these are fast moving electrons. … Gamma – these are photons, just like light, except of much higher energy, typically from several keV to several MeV.

How does radioactivity kill?

As radioactive material decays, or breaks down, the energy released into the environment has two ways of harming a body that is exposed to it, Higley said. It can directly kill cells, or it can cause mutations to DNA. If those mutations are not repaired, the cell may turn cancerous.

What are the two types of radioactivity?

There are four major types of radiation: alpha, beta, neutrons, and electromagnetic waves such as gamma rays. They differ in mass, energy and how deeply they penetrate people and objects. The first is an alpha particle.

What do we use radioactivity for?

Today, to benefit humankind, radiation is used in medicine, academics, and industry, as well as for generating electricity. In addition, radiation has useful applications in such areas as agriculture, archaeology (carbon dating), space exploration, law enforcement, geology (including mining), and many others.

How does radioactivity occur?

Radioactive decay a the spontaneous process through which an unstable atomic nucleus breaks into smaller, more stable fragments. … In the case of radioactive decay, instability occurs when there is an imbalance in the number of protons and neutrons in the atomic nucleus.