question of the day 1.put the following in chronological order (use your notes if needed): discovery...
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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
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Parts of Atoms, Isotopes, and Ions
• Isotopes
–Atoms of one element
•Same number of _______
•Different numbers of ________
•Different ______
protonsprotonsneutronsneutrons
massesmasses
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Parts of Atoms, Isotopes, and Ions
• Ions
–________ atoms that have gained or lost ________
–Examples
• Iron loses 2 electrons
•Chlorine gains 1 electron
ChargedChargedelectronselectrons
FeFe +2 +2
ClCl -1 -1
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Parts of Atoms, Isotopes, and Ions
Fundamental parts of atoms
COMPONENTCHARGE
APPROXIMATE MASS (in amu)
LOCATION IN ATOM
electroelectronn
- 1- 1 0.000550.00055
shellshellss
protonproton + 1+ 1 1.0 1.0 nucleusnucleus
neutronneutron 00 1.000551.00055 nucleusnucleus
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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
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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
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Parts of Atoms, Isotopes, + Ions
–Individual _____ of any element
–Represented with a _______ symbol
XXAA
ZZ
CC
atomatomnuclearnuclear
element symbolelement symbolmass numbermass number
atomic numberatomic number
•X = _______ _______
•A = ____ _______
•Z = ______ _______
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Parts of Atoms, Isotopes, and Ions
•X = _______ _______
•A = ____ _______
•Z = ______ _______
= ______ _______
•C = ______ __ __ ___
•# neutrons = ___ - ___
•# electrons = ___ - ___
XXAA
ZZ
CCelement symbolelement symbolmass numbermass number
atomic numberatomic numberprotons protons numbernumber
charge as an ioncharge as an ionAA ZZ
ZZ CC
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Parts of Atoms, Isotopes, and Ions
XX1919 1-1-Mass number?Mass number?
Atomic number?Atomic number?
# of neutrons?# of neutrons?
Element?Element?
Charge?Charge?
# of electrons?# of electrons?
99
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• Nuclear Reactions
–What forces act in the atom?
•______ _______ force holds _______ together
•_____ _______ force causes ___________
–Natural radioactivity, radioactive decay, or nuclear disintegration is the ___________ …
Strong Strong nuclearnuclearprotonsprotons
Weak nuclearWeak nuclearradioactivityradioactivity
spontaneousspontaneous
Particles of Radioacty. + Nuc. Rxns.
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• Nuclear Reactions
–Natural radioactivity, radioactive decay, or nuclear disintegration is the ___________ … ________ of ________ from an element due to instability of the _______.
spontaneousspontaneousradiationradiation
nucleusnucleus
emissionemission
Particles of Radioacty. + Nuc. Rxns.
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• 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.
neutronsneutrons
8383
Particles of Radioacty. + Nuc. Rxns.
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Protons
Bohr’s model
Gamma rays
Nucleons
Plum Pudding model
Quarks
Neutrons
Beta particles
Electron cloud
Atom
Dalton
Gold Foil Experiment
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Question of the DayUse the nuclear symbol below to fill
in the blanks:
mass # = ____
atomic # = ____
# of neutrons = ____
# of electrons = ____SS
3333
1616
-2-2
33
1617
18
Day 1 12-4
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