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when a nucleus is unstable and emits particles and energy.
spherical orbital that may contain a maximum of 2 electrons. Found in every energy level
a chemical reaction in which two or more chemicals combine to form a more complex product.
the hydrogen half cell electrode.
the phase of matter in which the particles have enough free space to move about, but still...
a group of atoms that are bonded together. It has an unequal number of protons and electrons and...