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Chapter 17

vocabulary

TermDefinition
atom is the smallest piece of matter that still retains the property of the element.
nucleus is surrounded by a cloud containing electrons.
proton are particles with an electrical charge of 1+
neutron are neutral particles that do not have an electrical charge
electron are particles with an electrical charge of 1-
quark smaller particles that are made up of protons and neutrons
electron cloud is the area around the nucleus of an atom where its where electrons are most likely found
atomic number the number of protons in an atom is equal to a number
mass number an atom is the sum of the number of protons and the neutrons in the nucleus of an atom.
isotope atoms of the same element that have different numbers of neutrons
average atomic mass an element is the weighted-average mas of the mixture of its isotopes
periodic table a table of elements
group families the elements are in.
electron dot diagram uses the symbol of the element and dots to represent the electrons in the outer energy level.
period rows of elements on the periodic table that are horizontal.
Created by: Hilda_Munoz