atomic theory structure radioactive decay

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Last updated 9:03 PM on 9/13/26
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18 Terms

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Nucleus

The central positive charge region of an atom containing protons and neutrons held by the strong nuclear face accounting for less than 1% of atomic volume, but nearly all its mass

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Strong nuclear force

The powerful attractive force that holds protons and neutrons together within the atomic nucleus

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Proton

A subtopic particle located in the nucleus with a positive charge +1 and a mass of 1U

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Neutron

A neutral subatomic particle located in the nucleus with no charge and mass of one U

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Electron

A model subatomic particle located in the electron cloud with a negative charge and a fiction mass of 0U one over 1836TH of a proton mass

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Atomic mass unit

A unit of measurement abbreviated as you used to represent the relative mass of a subatomic, particle or protons and neutrons, each equal one U

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Atomic number Z

The number of protons in a nucleus of an atom which uniquely defines the identity of an element

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Atomic mass Y

The total mass of an individual atom calculated as the sum of its protons and neutrons Y equals P plus N

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Isotopes

Atoms are the same element that have the same number of protons atomic number, but different numbers of neutrons, resulting in a different atomic mass

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Percentage abundance/fractional abundance

The percentage of all atoms of a specific element found in nature that consists of a particular isotope

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Average atomic mass Y average

The weighted average mass of naturally occurring isotopes of the element calculated using Y average equals X1Y1+ X2Y2 plus… Where X is fractional abundance

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CATION

A positively charged ion formed when a neutral atom or molecule loses one or more electrons

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ANION

A negative charged ion formed when a natural atom or molecule gain of one or more electrons

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Alpha particle

A positively charged particle consisting of two protons and two neutrons four/ 2 HE injected from large unstable nuclei

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Beta decay

A type of radioactive decay were neutron, degrades into protons and injects a high energy electron zero over negative 1E forms the nucleus

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Proton admission

A type of radioactive decay, where proton degrades into a neutron and injects a proton from the nucleus

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Electron capture

A nuclear reaction in which the inner electron falls into the nucleus and combines with a proton to form a neutron

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Gamarra

High energy, proton 00 eliminated as an excited nucleus transports to a lower energy state possessing extremely high penning power