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Protons.The atomic number of an atom is the number of protons in the atom.

The identity of an atom is based on its atomic number, so a change in the number of protons mean an atom has turned into a different element. However, an addition or subtraction of neutrons creates different isotopes of an element, and a change in the number of electrons creates an ion of the element.

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How can you figure out how many of each subatomic particle is in a atom has?

To determine the number of each subatomic particle in an atom, you need to know the atom's atomic number and mass number. The atomic number tells you the number of protons, while the mass number gives you the total number of protons and neutrons combined. Subtract the atomic number from the mass number to find the number of neutrons. Electrons will equal the number of protons in a neutral atom.


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.


What subatomic particle makes an element unique?

The number of protons is unique for every element.Varying the number of neutrons will give you an isotope of the same element.Varying the number of electrons will give you an ion of the same element.


The subatomic particle that gives an atom its identity?

This is the proton.


What is the subatomic particle that gives an atom its identity?

This is the proton.


What subatomic particle helps identify the element's identity?

There is no individual sub-atomic particle that is responsible for the identity of an element. It is the way the electrons, protons and (neutrons) are arranged in an element that gives it it's identity.


What subatomic particles gives an atom its identity?

Protons are the subatomic particles that give an atom its identity. The number of protons in the nucleus determines the element's atomic number, which in turn defines the specific type of atom.


Relation between subatomic particles and atomic mass unit?

protons and neutrons are subatomic particles and adding the two amounts together gives you the atomic mass unit


What information about the subatomic makeup of an atom is given by the atomic number?

The atomic number of an atom gives the number of protons in its nucleus, which also determines its unique identity as an element. It also indirectly gives the number of electrons in a neutral atom, as the number of protons is balanced by the number of electrons in the atom.


When an atom gives off a(an)..... It becomes an atom with an atomic number of two less?

An alpha particle, which is the nucleus of a helium atom.


What gives you the atomic number?

The total of number of protons in the nucleas gives you the atomic number.


Determine the number of each of the three types of subatomic particles in selenium?

Selenium has 34 protons, 34 electrons, and its most common isotope has 45 neutrons, which gives it a mass number of approximately 79. The number of each subatomic particle can vary slightly depending on the specific isotope of selenium.