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particles atomic
atomic particles numbers and radiation
Question | Answer |
---|---|
The number of protons in an atom of an element. | Atomic number. |
An atom of the same element that has a different number of neutrons. | Isotope. |
The sum of the protons and neutrons in the nucleus of an atom. | Mass number. |
The average mass of an atoms Isotopes weighted according to the abundance of each Isotope. | Average atomic mass. |
This refers to an element that spontaneously emits radiation. | Radioactive. |
Occurs when and unstable nucleus changes into another more stable nucleus by emitting radiation. | Nuclear decay. |
Type of nuclear decay that emits a particle made of two protonas and two neutrons. | Alpha particle. |
Type of nuclear decay in which a particle made of one high energy electron is emitted and a neutron changes to a proton. | beta |
Type of nuclear decay that does not emit a particle. A high energy wave instead. | Gama. |
Positive particle found in nucleus of an atom. | Proton |
Neutral particle found in nucleus of atom. | Neutron. |
Negatively charged particle found in the electron cloud surrounding the nucleus of an atom. | Electron. |
Mass of a proton. | 1 amu. |
Mass of a neutron. | 1 amu. |
Mass of an electron. | 1/1840 of one amu. |
Atom with more or less electrons. | Ion. |
Atomic Mass Unit | Unit of measure for atomic particles. Value is equal to the mass of 1 proton. |