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Bonnie Branch MS 8th

Bonnie Branch MS 8th gr- 3-1 Inside the Atom

QuestionAnswer
nucleus the central core of an atom containing protons and usually neutrons
proton small positively charged particle in the nucleus of an atom
neutron small uncharged particle in the nucleus of an atom
electron a tiny, negatively charged, high-energy particle that moves in the space outside the nucleus of an atom
atomic number the number of protons in the nucleus of an atom
atomic mass unit (amu) a unit of measurement for the mass of particles in atoms (1 neutron = 1 amu & 1 proton = 1 amu)
valence electrons the electrons that are farthest away from the nucleus of an atom and involved in chemical reactions (the
electron dot diagram a representation of the number of valence electrons in an atom using dots placed around the symbol of an element
isotope an atom with the same number of protons and DIFFERENT NUMBER OF NEUTRONS from other atoms of the same element
Created by: kjanelli