Transcript Semester I Review

Semester I Review
Semester I Review
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How many sig-figs are found in each
number?
 0.345
 3005
 300
 3.002
 0.00023
Semester I Review
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Round each number to three sig-figs.
 45678
 0.002894
 23.76
 100.5
 56.799
Semester I Review
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Which of the following is a mixture.
 Pure
water
 Clean air
 Iron (II) oxide
 Salt water
 Carbon dioxide
Semester I Review
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Which of the following is a chemical
change.
 Cutting
paper
 Boiling water
 Rusting iron
 Burning gasoline
Complete the table using the given
numbers
Symbol
Mass #
X - ___
Atomic #
Protons
10
Electrons
15
Y - 35
Z - ___
Neutrons
14
56
25
Semester I Review
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Calculate the average atomic mass given
the following data: element Y has three
isotopes 35.0% = 23.5 amu, 55.0% = 25.0
amu and 10.0% = 26.0 amu.
Semester I Review
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25.0 grams of a given metal displaces
44.2 mL of water; what is the density of the
metal?
Semester I Review
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What did each scientist contribute to the
development of the modern atom.
 Dalton
 Thomson
 Rutherford
 Milliken
Determine if the data below is
accurate, precise, both, or neither
Trial #
Measurement
1
34.56
2
34.45
3
34.78
True Value = 34.50
Calculate the percent error using the
average of the measurements.
Semester I Review
1.
2.
3.
The splitting of a nucleus is known as
________.
The combining of two small nuclei to
form a larger one is known as
__________.
Give the formula of an alpha particle and
beta particle.
Semester I Review
1.
Decay of polonium-218 by alpha ()
emission.
2.
Decay of carbon – 14 by beta emission
3.
Decay of Thorium - 232 by an electron
capture
Semester I Review
1. The half-life of phosphorous-30 is 2.5
min. If you start with 55 g of
phosphorus-30, how many grams would
remain after 27.5 min?
Semester I Review
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A radioactive isotope decayed from 200.0
grams to 3.125 grams in 15 years.
Determine the half-life of the isotope.
Semester I Review
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Calculate the wavelength of
electromagnetic radiation with a frequency
of 6.5x1016 Hz.
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Calculate the energy of the above
electromagnetic radiation.
Semester I Review
If n=4; how many sublevels, Orbitals, and
Electrons are present?
 T or F (p) sublevels have 7 orbitals
 T or F (d) sublevels hold 6 electrons
 T or F (s) sublevels hold 2 electrons
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Semester I Review
For the element Cobalt; give the:
 Long hand electron configuration
 Box and arrow notation
 Noble gas configuration
 Electron Dot Structure
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Semester II Review
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Which of the following elements has
the smallest first ionization energy:
potassium or calcium?
Which of the following has the
smallest atomic radius: O or S?
The energy required to remove an
electron from a gaseous atom is
called the _______.
Semester II Review
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Atomic size generally ____ as you
move left to right in a period.
How does atomic radius change
down a group in the periodic table?
How does ionization energy change
as you move up and to right on the
periodic table?
Semester II Review
Sheilding will ________ as you go down a
group.
 Sheilding will ________ as you move left
to right across a period.
 Electronegativity will _______ as you
move down and to the left.
 Columns on the periodic table are known
as_______.
 Rows on the table are known as_______.
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