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Chap. 4 Atomic Struc

Chap. 4 Atomic Structure

atom the smallest particle of an element that retains its identify in a chemical reaction
atomic mass unit defined as 1/12 the mass of a carbon-12 atom
atomic number the number of protons in the nucleus of an atom of an element
electron a negatively charged subatomic particle found in the energy levels surrounding the nucleus
group a vertical column of elements in the periodic table; contains elements with similar properties
isotope atoms of the same element that have the same atomic number but different atomic masses
neutron a subatomic particle with no charge and a mass of 1 amu; found in the nucleus of the atom
nucleus tiny, dense central portion of the atom, composed of protons and neutrons
periodic table an arrangement of elements in which the elements are separated into groups based on a set of repeating properties
proton a positively charged subatomic particle found in the nucleus of an atom
Created by: annericson