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Atomic Structure Vocabulary
Terms in this set (19)
Changing one element into another by bombarding it with particle bullets in a particle accelerator.
The number that identifies an element, equal to an atom's number of protons.
Atomic Mass Unit (amu)
1/12 the mass of a C-12 atom, the approximate mass of protons and neutrons.
Change in direction due to an outside force.
To give off something.
The time it takes for half the mass of a sample of radioactive isotope to undergo decay. The period of time in which any given nucleus has a 50% chance of undergoing radioactive decay.
Atoms of the same element that contain different numbers of neutrons and therefore differ in atomic mass as well.
The mass that was lost during a nuclear change that was converted into energy via E=mc2.
The sum total of the protons and neutrons in an atom.
The spontaneous breakdown of an unstable nucleus into a more stable nucleus and a decay particle (alpha, beta-negative, beta-positive
The particle that has no charge and has a mass of 1 a.m.u.
The net positive charge of the nucleus, equal to the number of protons in the nucleus.
The process whereby a large nucleus is split by artificial transmutation into smaller nuclei with the release of a large amount of energy derived from the conversion of a tiny bit of mass into energy.
The process whereby two small nuclei are combined to form one larger nucleus with release of a huge amount of energy derived from the conversion of a tiny bit of mass into energy.
A particle that exists in the nucleus (protons and neutrons.)
The central core of the atom, consists of protons and neutrons and has a net positive charge.
A device that uses electromagnetic fields to accelerate charged particles.
A particle that represents a unit charge of +1 and a mass of 1 a.m.u.
The average mass of a sample of element that is determined by the mass and abundance of every isotope of that element.
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