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Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two.

What happens when alpha decay occurs?

In alpha decay, the atomic number changes, so the original (or parent) atoms and the decay-product (or daughter) atoms are different elements and therefore have different chemical properties.

What is an alpha particle what happens in alpha decay?

Alpha decay is a nuclear decay process where an unstable nucleus changes to another element by shooting out a particle composed of two protons and two neutrons. This ejected particle is known as an alpha particle and is simply a helium nucleus.

When alpha particle is emitted then?

When an atom emits an alpha particle in alpha decay, the atom's mass number decreases by four due to the loss of the four nucleons in the alpha particle. The atomic number of the atom goes down by two, as a result of the loss of two protons – the atom becomes a new element.

What happens in the nucleus when alpha and beta decay occurs?

In alpha decay, the nucleus loses two protons. In beta decay, the nucleus either loses a proton or gains a proton. In gamma decay, no change in proton number occurs, so the atom does not become a different element.

When U 238 emits an alpha particle The resulting nucleus has?

Uranium-238 undergoes alpha decay to become thorium-234. (The numbers following the chemical names refer to the number of protons plus neutrons.) In this reaction, uranium-238 loses two protons and two neutrons to become the element thorium-234.

When an alpha particle is ejected from a nucleus?

Because alpha particles have two positive charges and a mass of four units, their emission from nuclei produces daughter nuclei having a positive nuclear charge or atomic number two units less than their parents and a mass of four units less.

What product nucleus will be formed when radium emits an alpha particle?

Rn (radon) nucleus When a nucleus of Ra (radium) decays, it emits an alpha particle and becomes an Rn (radon) nucleus.

When one particle is emitted from a nucleus then?

The emission of the β particle will lead to an increase in 1 unit of atomic number and no change occurs in the mass of the atom. Since 1 unit of atomic number increases, so the number of protons will increase when β decay occurs. Hence, option 4 is correct.

What is another name for the alpha particle that is emitted during alpha decay?

helium nucleus Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two.