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Nuclear Physics Vocab

Across
radioactive decay where a neutron is changed into a proton in nucleus and beta particle and antineutrino are emitted
repeated fission reactions caused by release of neutrons from previous fission reactions
each of differing forms of same atom with different masses but same chemical properties
mass of an atom in amu's or u's
attractive force that binds nucleus together; has the same strength between the protons and protons, protons and neutrons, and neutrons and neutrons
number of decays per second in a radioactive substance
materials that undergo radioactive decay and emit penetrating rays
nucleus of an isotope
neutrally charged pieces of the nucleus
Down
negitivly charged pieces of the nucleus
energy equivalent of mass defect: always negative
positively charged pieces of the nucleus
a nucleus is divided in two or more fragments, neutrons and energy are released
number of protons in an atom's nucleus
radioactive decay where alpha particles are emitted from the nucleus
radioactive decay where there's redistribution of energy in the nucleus without change in atom's mass or charge
nuclei with small masses combined into one big nucleus and energy is released
sum of neutrons and protons in a nucleus
time required for half of the atoms in a radioactive isotope to decay
smallest amount of matter that retains chemical properties, pure substance