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An alpha particle is composed of two protons and two neutrons, so when an atom loses an alpha particle, its mass number decreases by four. However, since the atom loses two protons, it is now a different element. It is now the element with an atomic number minus the two protons.

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9y ago

Its atomic number is reduced by 2 and its mass number reduced by 4

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Q: What change is atomic number occurs when a nucleus emits an alpha particle?
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Related questions

When an unstable nucleus produces an beta particle by how many units does the atomic number of the nucleus change?

The atomic number decreases by one for each beta particle


What happens to the atomic number when the nucleus releases a beta particle?

When the nucleus releases a beta minus particle the atomic number increase with 1.When the nucleus releases a beta plus particle the atomic number decrease with 1.


When an unstable nucleus produces an alpha particle by how many units does the atomic number of the nucleus change?

An alpha particle is a helium nucleus, which consists of 2 protons and 2 neutrons. When an unstable nucleus emits an alpha particle, it loses 2 protons, which means its atomic number will be reduced by 2.


What particle does the atomic number equal in the nucleus?

The number of Protons in the nucleus determines the atom's Atomic number.


What is proton or atomic number?

A proton is a subatomic particle in the nucleus of an atom. Protons have a positive electric charge. The atomic number of an element is equal to the number of protons in the nucleus of one of its atoms. Therefore, if you change the number of protons in an atom, you change the element.


If a radioactive nucleus with an atomic number of 88 emits an alpha particle what will the atomic number of the new nucleus be?

Two less, since the alpha particle takes away two protons.


What does An alpha particle has the same mass and atomic number as?

Helium nucleus


That particle that gives an element its atomic number is in this part?

The atomic number is determined by the number of protons, which are located in the nucleus.


Nucleus of the chemical element atomic number 2 emitted by some radioactive substances?

alpha particle, He nucleus


The atomic number of an element is equal to the number of contained in one atom of that particle?

The atomic number of an element is equal to the number of protons contained in the atomic nucleus.


When thorium emits beta particle the resulting nucleus has a atomic number?

The resulting element is protactinium, atomic number 91.


The atomic number is the number of what in an element?

An element's atomic number is a count of how many protons are normally part of the element's nucleus. Since protons are normally the only particle in the nucleus with a charge (+), the atomic number also represents the charge of the nucleus.