Chemistry Final Exam Prep

Know signs of a chemical reaction. - Formation of a precipitate - The production of gas - A transfer of heat energy - A change in ______

Know what the subscripts in chemical formulas mean. - Tells you the # of atoms in the ______

Know the makeup of an atom. (Electrons, protons neutrons, their charges, their mass, their ______

Know what an isotope is. - An isotope is 2 or more of the same element with the same number of protons but a different number of neutrons in the nucleus, therefore having a different atomic ______

Know the organization of the PTE and how to gain information from the PTE. (mass number, main group and charge of ion as well as number of valence electrons, meaning of atomic number, metal, non-metal ______

Know how to balance a chemical reaction. (look at w/s and notes)

Know the number of valence electrons tells you what group they are in (an example is if it has one valence electron then it is in group one and so on) note that if it has no valence electrons then it is in the 8th group

Know the difference between an atom and an ion.

Know the organization of the PTE and how to gain information from the PTE. (mass number, main group and charge of ion as well as number of valence electrons, meaning of atomic number, metal, non-metal position)

Know the number of valence electrons tells you what ______ they are in (an example is if it has one valence electron then it is in ______ one and so on) note that if it has no valence electrons then it is in the 8th ______