Examlex
________ are people within a reference group who, because of special skills, knowledge, personality, or other characteristics, exert influence on others.
Alpha Particle Emission
A type of radioactive decay in which an unstable atomic nucleus emits an alpha particle (2 protons and 2 neutrons) to form a new nucleus, decreasing its atomic number by 2 and mass number by 4.
Positron Particle Emission
A type of beta decay in which a positron is ejected from an atomic nucleus, transforming a proton into a neutron.
Beta Particles
High-speed electrons or positrons emitted by certain types of radioactive decay, such as beta decay.
Alpha Particles
Helium-4 nuclei emitted during radioactive decay, consisting of two protons and two neutrons, with a +2 charge, commonly used in radiation therapy and experiments.
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