True The half-lives of unstable isotopes vary from milliseconds to billions of years. The combining of atoms is known as nuclear fusion.
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The number of positive charges in the nucleus of an atom is equal to: its atomic number Most of the mass of an atom is made up of: The protons and neutrons Movement of electrons about a central nucleus is a concept by: Boor Periodicity is best defined as: The repeating nature of physical and chemical properties with increasing The last element in any period always has: eight electrons in the outermost energy level The maximum number of electrons in a p sub-level is: 3 The 3 in up represent TTS: the number of electrons Name the element that corresponds to the following electron configuration
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