Transcript Chapter 4 Review “Atomic Structure

Chapter 4 Review
“Atomic Structure”
Chapter 4 Review
All atoms of the same element have the
same _____.
 Know Dalton’s Atomic Theory and
Rutherford’s Nuclear Model.
 An element has an atomic number of
76. What is the number of protons and
electrons in a neutral atom of this
element?
 How is the number of neutrons in the
nucleus of an atom calculated?

Chapter 4 Review
 All
atoms are neutral, with the
number of protons equaling the ___.
 Isotopes of the same element have
different _____.
 Using the periodic table, determine
the number of neutrons in 16O.
 What does the number 84 represent
in the name krypton-84?
Chapter 4 Review
 What
is the correct complete symbol
for an atom of tritium?
 Know who discovered the neutron,
and in what year.
 Dalton said that atoms were
indivisible and atoms of the same
element were identical. Have any
changes been made to this?
Chapter 4 Review
 The
mass number of an element is
equal to _____.
 The sum of the protons and
neutrons in an atom equals the __.
 What is the purpose of comparing
the number of atoms of copper in a
coin the size of a penny with the
number of people on the earth?
Chapter 4 Review
 The
atomic number of an element is
the total number of ____.
 How do the isotopes of hydrogen-1
and hydrogen-2 differ?
 What hypothesis led to the
discovery of the proton?
 The element Indium has __ protons
and ___ electrons.
Chapter 4 Review
 Why
did J. J. Thomson reason that
electrons must be a part of the
atoms of all elements?
 Isotopes of the same element have
different ____.
 Know characteristics regarding the
nucleus of an atom.
 Are these the same element?
38? and 39?
Chapter 4 Review
 Describe
the model of the atom as a
result of Rutherford’s discovery of
the nucleus.
 The smallest particle of an element
that retains the properties of that
element is a(n) ____.
 Know the complete symbol for an
20
element, and what it means: 10 X
Chapter 4 Review
 What
is the relative mass of an
electron?
 The particles that are found in the
nucleus of an atom are ____.
 Know the ideas from Democritus.
 Who conducted experiments to
determine the quantity of charge
carried by an electron?
Chapter 4 Review
 How
many protons, electrons, and
neutrons does an atom with atomic
number 50 and mass number 125
contain?
 Who was the man who lived from
460 B.C. – 370 B.C., and was among
the first to suggest the idea of
atoms?
Chapter 4 Review
 Know
the characteristics of subatomic
particles.
 A fictitious element “X” has 10.0 % of
the isotope with mass 55 amu, 20.0 %
of the isotope with mass 56 amu, and
70.0 % of the isotope with mass 57
amu. Calculate the average atomic
mass of element X.
56.6 amu
Chapter 4 Review
 Element
“Z” has two isotopes: one
has mass number of 19.0 amu is 55.0
% abundant, and the isotope with
mass number 21.0 amu is 45.0 %
abundant. What is the average
atomic mass for element Z? 19.9 amu
 How many protons are present in an
atom of Beryllium-9?
Chapter 4 Review
 Calculate
the number of neutrons in
Lead-210.
 Determine the number of electrons
in an atom of Iridium.
 About how many more times
massive is a proton than electron?
 How many neutrons are present in
an isotope of uranium-235?
Chapter 4 Review
 What
is the atomic number for an
element with 41 neutrons and a
mass number of 80?
 Use the periodic table to determine
the number of protons in barium.
 How many protons are present in
the nuclei of the three known
isotopes of hydrogen?
Chapter 4 Review
 What
is the mass number for an
oxygen atom that has 10 neutrons
in its nucleus?
 How many electrons are in an atom
of gold?
 What is the total number of
subatomic particles in the nucleus of
an atom of bismuth-209?
Chapter 4 Review
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Use the periodic table to determine the
number of electrons in a neutral atom of
lithium.
Be able to explain the differences between
elements and isotopes.
Be able to calculate average atomic mass.