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for test #2 of chemistry

Protons Particles that carry a positive electrical charge, located in nucleus.
Neutrons Particles that have no electrical charge, located in nucleus.
Electrons Particles that have a negative charge and surround the nucleus in an electron cloud.
Nucleus The center of the atom, contains neutrons and protons
Electron Cloud Space where electron rings or levels are found.
Electron Rings Rings that the electrons are arranged on that determine the atom's stability.
Molecule Chemically bonded elements (atoms)
Element A single kind of atom
Rule #1 of Formulas The element symbol stands for one atom of that element in the molecule.
Rule #2 of Formulas IF a subscript is after the symbol, there is more than one atom of that element in the molecule. The subscript tells you how many atoms of that element are present in the molecule.
Rule #3 of Formulas If a symbol or group of symbols is surrounded by parentheses with a subscript outside the parentheses, multiply the number of each of the atoms inside the parentheses by the subscript.
Rule #4 of Formulas Multiply the coefficient by the elements in front of it by there number of atoms.
Properties of a Chemical Change -A new substance is formed
Properties of Physical Change A change in state or shape only, no new substance is formed.
Created by: sleahy