Chapter 4 ReviewChapter 4 Review“Atomic Structure”“Atomic Structure”

Pre-AP ChemistryPre-AP Chemistry

Charles Page High SchoolCharles Page High School

Stephen L. CottonStephen L. Cotton

Chapter 4 ReviewChapter 4 Review All atoms of the same element have All atoms of the same element have

the same _____.the same _____. Know Dalton’s Atomic Theory.Know Dalton’s Atomic Theory. An element has an atomic number An element has an atomic number

of 76. What is the number of of 76. What is the number of protons and electrons in a neutral protons and electrons in a neutral atom of this element?atom of this element?

How is the number of neutrons in How is the number of neutrons in the nucleus of an atom calculated?the nucleus of an atom calculated?

Chapter 4 ReviewChapter 4 Review All atoms are neutral, with the All atoms are neutral, with the

number of protons equaling the ___.number of protons equaling the ___. Isotopes of the same element have Isotopes of the same element have

different _____.different _____. Using the periodic table, determine Using the periodic table, determine

the number of neutrons in the number of neutrons in 1616O.O. What does the number 84 represent What does the number 84 represent

in the name krypton-84?in the name krypton-84?

Chapter 4 ReviewChapter 4 Review What is the correct complete symbol What is the correct complete symbol

for an atom of tritium?for an atom of tritium? Know who discovered the neutron, Know who discovered the neutron,

and in what year.and in what year. Dalton said that atoms were Dalton said that atoms were

indivisible and atoms of the same indivisible and atoms of the same element were identical. Have any element were identical. Have any changes been made to this?changes been made to this?

Chapter 4 ReviewChapter 4 Review The mass number of an element is The mass number of an element is

equal to _____.equal to _____. The sum of the protons and The sum of the protons and

neutrons in an atom equals the __.neutrons in an atom equals the __. What is the purpose of comparing What is the purpose of comparing

the number of atoms of copper in a the number of atoms of copper in a coin the size of a penny with the coin the size of a penny with the number of people on the earth?number of people on the earth?

Chapter 4 ReviewChapter 4 Review The atomic number of an element is The atomic number of an element is

the total number of ____.the total number of ____. How do the isotopes of hydrogen-1 How do the isotopes of hydrogen-1

and hydrogen-2 differ?and hydrogen-2 differ? What hypothesis led to the What hypothesis led to the

discovery of the proton?discovery of the proton? The element Indium has __ protons The element Indium has __ protons

and ___ electrons.and ___ electrons.

Chapter 4 ReviewChapter 4 Review Why did J. J. Thomson reason that Why did J. J. Thomson reason that

electrons must be a part of the electrons must be a part of the atoms of all elements?atoms of all elements?

Isotopes of the same element have Isotopes of the same element have different ____.different ____.

Know characteristics regarding the Know characteristics regarding the nucleus of an atom.nucleus of an atom.

Are these the same element? Are these the same element?

3838? and ? and 3939??

Chapter 4 ReviewChapter 4 Review Describe the model of the atom as a Describe the model of the atom as a

result of Rutherford’s discovery of result of Rutherford’s discovery of the nucleus.the nucleus.

The smallest particle of an element The smallest particle of an element that retains the properties of that that retains the properties of that element is a(n) ____.element is a(n) ____.

Know the complete symbol for an Know the complete symbol for an element, and what it means: Xelement, and what it means: X

20

10

Chapter 4 ReviewChapter 4 Review What is the relative mass of an What is the relative mass of an

electron?electron? The particles that are found in the The particles that are found in the

nucleus of an atom are ____.nucleus of an atom are ____. Know the ideas from Democritus.Know the ideas from Democritus. Who conducted experiments to Who conducted experiments to

determine the quantity of charge determine the quantity of charge carried by an electron?carried by an electron?

Chapter 4 ReviewChapter 4 Review How many protons, electrons, and How many protons, electrons, and

neutrons does an atom with atomic neutrons does an atom with atomic number 50 and mass number 125 number 50 and mass number 125 contain?contain?

Who was the man who lived from Who was the man who lived from 460 460 B.C.B.C. – 370 – 370 B.C.B.C., and was among , and was among the first to suggest the idea of the first to suggest the idea of atoms?atoms?

Chapter 4 ReviewChapter 4 Review Know the characteristics of subatomic Know the characteristics of subatomic

particles.particles. A fictitious element “X” has 10.0 % of A fictitious element “X” has 10.0 % of

the isotope with mass 55 amu, 20.0 % the isotope with mass 55 amu, 20.0 % of the isotope with mass 56 amu, and of the isotope with mass 56 amu, and 70.0 % of the isotope with mass 57 70.0 % of the isotope with mass 57 amu. Estimate the atomic mass of amu. Estimate the atomic mass of element X.element X.

Chapter 4 ReviewChapter 4 Review Element “Z” has two isotopes: one Element “Z” has two isotopes: one

has mass number of 19.0 amu is has mass number of 19.0 amu is 55.0 % abundant, and the isotope 55.0 % abundant, and the isotope with mass number 21.0 amu is 45.0 with mass number 21.0 amu is 45.0 % abundant. What is the average % abundant. What is the average atomic mass for element Z?atomic mass for element Z?

How many protons are present in an How many protons are present in an atom of Beryllium-9?atom of Beryllium-9?

Chapter 4 ReviewChapter 4 Review Calculate the number of neutrons in Calculate the number of neutrons in

Lead-210.Lead-210. Determine the number of electrons Determine the number of electrons

in an atom of Iridium.in an atom of Iridium. About how many more times About how many more times

massive is a proton than electron?massive is a proton than electron? How many neutrons are present in How many neutrons are present in

an isotope of uranium-235?an isotope of uranium-235?

Chapter 4 ReviewChapter 4 Review What is the atomic number for an What is the atomic number for an

element with 41 neutrons and a element with 41 neutrons and a mass number of 80?mass number of 80?

Use the periodic table to determine Use the periodic table to determine the number of protons in barium.the number of protons in barium.

How many protons are present in How many protons are present in the nuclei of the three known the nuclei of the three known isotopes of hydrogen?isotopes of hydrogen?

Chapter 4 ReviewChapter 4 Review What is the mass number for an What is the mass number for an

oxygen atom that has 10 neutrons oxygen atom that has 10 neutrons in its nucleus?in its nucleus?

How many electrons are in an atom How many electrons are in an atom of gold?of gold?

What is the total number of What is the total number of subatomic particles in the nucleus of subatomic particles in the nucleus of an atom of bismuth-209?an atom of bismuth-209?

Chapter 4 ReviewChapter 4 Review Use the periodic table to determine Use the periodic table to determine

the number of electrons in a neutral the number of electrons in a neutral atom of lithium.atom of lithium.