The periodic table is a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.

  • The metals, nonmetals, and the metalloids are the elements name
  • The protons have a positive charge, the electrons have a negative charge and the neutrons have no charge and they are a subatomic particle
  • The father of the periodic table is Dmitir Mendeleev
  • the noble gasses are the least reactive and the caesium and fluorine are the most reactive elements on the periodic table
  • there are 18 groups and 7 periods of the periodic table
  • lanthanoids, actanoids, alkali metals
Atomic number, mass and Mass number
  1. the information on the element is organized on the basis of their atomic numbers, electron shell model, and recurring chemical properties
  2. the atomic number equals the number of electrons
  3. the atomic mass equals the number of nucleus
  4. you can find the number of electrons by subtracting the atomic number for the atomic mass
  • Valence electrons is an electron that is associated with an atom, and that can participate in the formation of a chemical bond
Balancing Equation
  • To balance a chemical equation has to equal the numbers of atoms for each element involved in the reaction are represented on the reactant and product sides
  • The arrow means the products and the substances are the reactants
  • Count the atoms of each element in the reactants and the product, then use coefficients and place them in front of the compounds as needed
  1. chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction and physical property Physical properties can be observed or measured without changing the composition of matter
  2. chemical change is any change that results in the formation of new chemical substances and physical change are changes affecting the form of a chemical substance, but not its chemical composition
  3. The 5 signs of a chemical change are color chage, formation of a precipitate, formation of a gas, odor change, temperature change


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