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CHCS 6th 5

CHCS 6th Grade Science Chapter 5

QuestionAnswer
Atoms the building blocks of all matter; made up of protons, neutrons, and elections
element a pure substance; all atoms have the same atomic number
nucleus the center of an atom; contains the protons and the neutrons
proton particle that has a positive charge
neutron particle that has no charge, or is neutral
electron a particle that has a negative charge
strong force this holds the nucleus together, keeping the protons and neutrons together
atomic number tells the number of protons and the number of electrons found in an element
atomic mass the mass of an atom; tells how many protons plus how many neutrons are in an element
shells energy levels where electrons can be found circling the nucleus
valence electron the electrons in the outer most shell of an atom
periodic table a chart that arranges elements into groups by their properties
electron energy levels another name for electron shells; energy levels where electrons can be found circling the nucleus
period a horizontal row of the periodic table; tells how many shells an element has
chemical family a group of elements that have similar properties; vertical columns on the periodic table; tells how many valence electrons each element has
groups another name for chemical family; a group of elements that have similar properties; vertical columns on the periodic table; tells how many valence electrons each element has
metal an element that usually has one, two, or three valence electrons and that is typically shiny, hard, and a good conductor of heat and electricity
nonmetal an element that usually has five, six, or seven valence electrons and that is typically dull, brittle, and a poor conductor of heat and electricity
Lewis dot structures a figure in which dots around and element's symbol represent valence electrons; also called an electron dot diagram
Created by: mrslisawatson on 2011-09-13



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