Download Ch 3 Review_2014a

Ch 3 Exam Review
Objective
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iWBAT
Participate in a Ch 3 exam review activity.
Drill
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Switch to the half life drill ppt
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This scientist developed the
Atomic Theory of Matter
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Ans: John Dalton
Ions
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An atom that loses an electron is called
a(n) ___________.
Ans:
cation
Who Developed this model of the
atom?
Who Developed this model of the
atom?
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Ans:
J.J. Thomson
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This type of radiation can be stopped by
paper or clothing
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Alpha
Which Scientist…
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Used the Oil Drop experiment to determine
the mass of an electron
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Robert Millikan
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What are the three characteristics that
allow you to distinguish between the three
types of radiation?
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Charge, mass, and penetrating power
Which Scientist…
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Called the negatively charged particles
electrons
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JJ Thomson
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Rutherford used this experiment to
determine that an atom contains a nucleus
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Gold Foil Experiment
(or Alpha Scattering experiment)
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A sodium atom has a charge of what?
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zero
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Beta particles consist of a stream of high
speed:
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electrons
Which scientist used this
experiment?
Which scientist used this
experiment?
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Ans:
Rutherford
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Who developed the four postulates of
atomic theory, including atoms are the
smallest, indivisible part of an element?
Ans:
John Dalton
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How many protons does the ion Na+1
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11
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If an element has 9 protons and 10
electrons does it have a positive or
negative charge?
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negative
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What are the three types of radioactive
particles/rays?
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Alpha, beta, and gamma
Who Developed this model of the
atom?
Who Developed this model of the
atom?
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Ans:
Erwin Schrodinger
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Who developed the Plum Pudding model?
Ans:
J.J. Thomson
Which Scientist…
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Named the core of the atom “the nucleus”
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Rutherford
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How many electrons does Na+1 have?
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10
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When writing the chemical symbol for an
ion, where is the charge written in relation
to the chemical symbol?
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In the upper right hand corner
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How many protons does Ca+2 have?
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20
Ions
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An atom that gains electrons is called
a(n) ___________.
Ans:
anion
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What subatomic particle has a charge of 0?
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A neutron
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Which subatomic particle has a charge of
+1
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A proton
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This type of radiation is not a particle
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gamma
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Who used the oil-drop experiment and what
did it prove?
Ans:
Robert Millikan-the charge to mass ratio of
the electron
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What did the Gold-foil experiment show?
Ans:
That the nucleus of the atom is very small
and positively charged.
Which scientist used this
experiment?
Which scientist used this
experiment?
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Ans:
Millikan
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What did the cathode ray tube experiment
prove?
Ans:
Electrons are negatively charged
Who Developed this model of the
atom?
Who Developed this model of the
atom?
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Ans:
Niels Bohr
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Who performed the gold-foil alpha
scattering experiment?
Ans:
Ernest Rutherford
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Who used cathode ray tubes to study
electrons?
Ans:
J.J. Thomson
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You determine the charge of an ion by
subtracting the number of electrons from:
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The number of protons
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A neutron changing into a proton and an
electron describes which type of radioactive
decay?
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beta
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If iron (Fe) undergoes alpha decay, what
element is formed?
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Cr (chromium)
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If nickel (Ni) undergoes beta decay, which
element is formed?
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Cu (copper)
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What is the symbol for an alpha particle?
See next slide for answer
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What is the symbol for an alpha particle?
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How many protons does F-1?
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9
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This type of radioactive particle has a mass
of 4 AMU, consisting of 2 protons and
2 neutrons
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Alpha particle
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Isotopes contain different numbers of:
______
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Neutrons
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All elements with atomic numbers greater
than what are radioactive?
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83
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What is the symbol for a beta particle?
See next slide for answer
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What is the symbol for a beta particle?
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What does the 37 stand for in chlorine - 37?
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The mass number
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Given the chemical symbol Kr, how many
neutrons are present?
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84 - 36= 48
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What is the approximate mass of an
electron in AMU?
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zero
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How many neutrons does Al (aluminum)
have?
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27-13 = 14
Which Scientist
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Developed the Quantum Mechanical model
of the atom?
Ans: Schrodinger
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As atomic number increases, the number of
neutrons and protons :
(increases or decreases)
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increases
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Which subatomic particle is responsible for
the increased mass of an isotope?
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neutron
Which Scientist
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Experimented using Cathode Ray Tubes?
Ans: Thomson
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This type of radiation can only be stopped
by concrete or lead
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gamma
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What is the specialty term that we give to
the atomic mass when we round it?
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The mass number
Which Scientist
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Is the Greek philosopher who believed that
there are small indivisible bodies from
which everything else is composed.
Ans: Democritis
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Nuclei are unstable if they contain too
many or too few:
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Neutrons
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Elements with atomic numbers between 1
and 20 have almost equal numbers of
protons and what?
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neutrons
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Radioactive elements are found in this area
of the periodic table?
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The bottom section
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This is the spontaneous emission of
radiation from an atom
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Radioactivity
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Name the 3 subatomic particles of an atom.
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Proton, neutron, electron
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What does the AMU stand for?
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Atomic Mass Unit
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Measured the charge of an electron using
the oil drop experiment.
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Millikan
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If an element has 19 protons and 18
electrons, what is its charge?
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+1
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Which subatomic particle has no charge?
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Neutron
Final Jeopardy
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This scientist wrote the 4 postulates of the atomic
theory of matter
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Dalton
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Which isotope is the entire periodic table based
on?
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Carbon-12