1. Question of the Day 1.Put the following in chronological order (use your notes if needed): discovery of neutron, Thomsen, Alchemists, Bohr, discovery of nucleus Day 4 11-22

2. Parts of Atoms, Isotopes, and Ions Isotopes –Atoms of one element Same number of _______ Different numbers of ________ Different ______ protons neutrons masses

3. Parts of Atoms, Isotopes, and Ions Ions –________ atoms that have gained or lost ________ –Examples Iron loses 2 electrons Chlorine gains 1 electron Charged electrons Fe +2 Cl -1

4. Parts of Atoms, Isotopes, and Ions Fundamental parts of atoms COMPONENT CHARGE APPROXIMATE MASS (in amu) LOCATION IN ATOM electron - 1 0.00055 shells shells proton + 1 1.0 nucleus neutron 01.00055 nucleus

5. Question of the Day 1.What is the nuclear symbol for an atom with 8 protons, 7 neutrons, and 10 electrons? Day 5 11-25

7. Question of the Day 1.What is the nuclear symbol for an atom with 9 protons, 10 neutrons, and 10 electrons? Day 6 12-3

8. Parts of Atoms, Isotopes, + Ions –Individual _____ of any element –Represented with a _______ symbol X A Z C atom nuclear element symbol mass number atomic number X = _______ _______ A = ____ _______ Z = ______ _______

9. Parts of Atoms, Isotopes, and Ions X = _______ _______ A = ____ _______ Z = ______ _______ = ______ _______ C = ______ __ __ ___ # neutrons = ___ - ___ # electrons = ___ - ___ X A Z C element symbol mass number atomic number protons number charge as an ion A Z ZC

10. Parts of Atoms, Isotopes, and Ions X 191- Mass number? Atomic number? # of neutrons? Element?Charge? # of electrons? 9

11. Nuclear Reactions –What forces act in the atom? ______ _______ force holds _______ together _____ _______ force causes ___________ –Natural radioactivity, radioactive decay, or nuclear disintegration is the ___________ … Strong nuclear protons Weak nuclear radioactivity spontaneous Particles of Radioacty. + Nuc. Rxns.

12. Nuclear Reactions –Natural radioactivity, radioactive decay, or nuclear disintegration is the ___________ … ________ of ________ from an element due to instability of the _______. spontaneous radiation nucleus emission Particles of Radioacty. + Nuc. Rxns.

13. Nuclear Reactions –Problems in nuclear stability occur when there are too few or too many ________. –All elements with an atomic number greater than ___ are radioactive. neutrons 83 Particles of Radioacty. + Nuc. Rxns.

14. Protons Bohr’s model Gamma rays Nucleons Plum Pudding model Quarks Neutrons Beta particles Electron cloud Atom Dalton Gold Foil Experiment

16. Question of the Day Use the nuclear symbol below to fill in the blanks: mass # = ____ atomic # = ____ # of neutrons = ____ # of electrons = ____ S 33 16 -2 33 16 17 18 Day 1 12-4