Question 1

Americium-241 is an isotope used in smoke detectors.What is the composition of a neutral atom of Americium-241?

Accepted Answer

A) 241 protons, 95 neutrons, 241 electrons 
B) 241 protons, 95 neutrons, 146 electrons 
C) 95 protons, 146 neutrons, 95 electrons 
D) 95 protons, 146 neutrons, 51 electrons 
E) 95 protons, 241 neutrons, 95 electrons 
A) 241 protons, 95 neutrons, 241 electrons 
B) 241 protons, 95 neutrons, 146 electrons 
C) 95 protons, 146 neutrons, 95 electrons 
D) 95 protons, 146 neutrons, 51 electrons 
E) 95 protons, 241 neutrons, 95 electrons

Question 2

Which two scientists in 1869 arranged the elements in order of increasing atomic masses to form a precursor of the modern periodic table of elements?

Accepted Answer

A) Bohr and Rutherford 
B) Plank and Rutherford 
C) Maxwell and Dalton 
D) Thomson and Crookes 
E) Mendeleev and Meyer 
A) Bohr and Rutherford 
B) Plank and Rutherford 
C) Maxwell and Dalton 
D) Thomson and Crookes 
E) Mendeleev and Meyer

Question 3

Which of the following statements relating to Bohr's model of the hydrogen atom is FALSE?

Accepted Answer

A) The lowest energy orbit has quantum number n = 1. 
B) The highest energy orbits are farthest from the nucleus. 
C) In a transition from the n = 3 to the n = 1 level, light is emitted. 
D) Energy differences between energy levels can be calculated from the wavelengths of the light absorbed or emitted. 
E) The Bohr model consists of energy levels that are evenly spaced, like the rungs of a ladder. 
A) The lowest energy orbit has quantum number n = 1. 
B) The highest energy orbits are farthest from the nucleus. 
C) In a transition from the n = 3 to the n = 1 level, light is emitted. 
D) Energy differences between energy levels can be calculated from the wavelengths of the light absorbed or emitted. 
E) The Bohr model consists of energy levels that are evenly spaced, like the rungs of a ladder.

Question 4

Which statement correctly describes the basis for the octet rule?

Accepted Answer

A) Atoms strive to attain eight protons in their nucleus to attain the stability of the nearest noble gas. 
B) Atoms have a tendency to form eight bonds with other atoms to attain the stability of a noble gas. 
C) Atoms will lose, gain, or share eight electrons to become a noble gas. 
D) Atoms are most stable with eight electrons in their outermost shell, and the electron configuration of a noble gas. 
E) Atoms are most stable when the number of protons they contain is identical to the noble gas closest to them in the periodic table. 
A) Atoms strive to attain eight protons in their nucleus to attain the stability of the nearest noble gas. 
B) Atoms have a tendency to form eight bonds with other atoms to attain the stability of a noble gas. 
C) Atoms will lose, gain, or share eight electrons to become a noble gas. 
D) Atoms are most stable with eight electrons in their outermost shell, and the electron configuration of a noble gas. 
E) Atoms are most stable when the number of protons they contain is identical to the noble gas closest to them in the periodic table.

Question 5

Which of the following is a metal in the third period?

Accepted Answer

A) Ge 
B) Cl 
C) Ca 
D) Mg 
E) Cu 
A) Ge 
B) Cl 
C) Ca 
D) Mg 
E) Cu

Question 6

The modern periodic law states that the physical and chemical properties of the elements are periodic functions of what property?

Accepted Answer

A) electrons 
B) atomic weight 
C) neutrons 
D) atomic number 
E) mass number 
A) electrons 
B) atomic weight 
C) neutrons 
D) atomic number 
E) mass number

Question 7

Tungsten is a metal containing 74 protons, and is used widely in the electronics industry.What is the chemical symbol for tungsten?

Accepted Answer

A) T 
B) Tg 
C) Tn 
D) W 
E) As 
A) T 
B) Tg 
C) Tn 
D) W 
E) As

Question 8

What was J.J.Thomson?s important discovery about cathode rays in 1897?

Accepted Answer

A) Cathode rays were indestructible. 
B) Cathode rays were heavier than anode rays. 
C) Cathode rays consisted of a stream of electrons. 
D) Cathode rays were produced by all radioactive atoms. 
E) Cathode rays were able to initiate radioactive decay of an atom. 
A) Cathode rays were indestructible. 
B) Cathode rays were heavier than anode rays. 
C) Cathode rays consisted of a stream of electrons. 
D) Cathode rays were produced by all radioactive atoms. 
E) Cathode rays were able to initiate radioactive decay of an atom.

Question 9

Which of the following accounts for the fact that chlorine has an atomic mass of 35.45 amu rather than a whole number?

Accepted Answer

A) isotopes 
B) electrons 
C) protons 
D) radioactivity 
E) isomers 
A) isotopes 
B) electrons 
C) protons 
D) radioactivity 
E) isomers

Question 10

What is a horizontal row of elements on the periodic table called?

Accepted Answer

A) group 
B) period 
C) family 
D) representative elements 
E) transition elements 
A) group 
B) period 
C) family 
D) representative elements 
E) transition elements

Question 11

Europium (Eu) is a lanthanide element.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following elements is most likely to form a 2+ ion?

Accepted Answer

A) Li 
B) K 
C) Al 
D) N 
E) Ca 
A) Li 
B) K 
C) Al 
D) N 
E) Ca

Question 13

If an atom gains one electron, it becomes an anion.

Accepted Answer

A) True 
 B)False

Question 14

In Rutherford's experiment, which led to the discovery of the atomic nucleus, what type of particle or ray was fired at the gold foil target?

Accepted Answer

A) alpha 
B) beta 
C) gamma 
D) neutrons 
E) cathode rays 
A) alpha 
B) beta 
C) gamma 
D) neutrons 
E) cathode rays

Question 15

What are the elements in the A-groups often called?

Accepted Answer

A) transition elements 
B) lanthanides 
C) metals 
D) non-metals 
E) representative elements 
A) transition elements 
B) lanthanides 
C) metals 
D) non-metals 
E) representative elements

Question 16

In nature, the element neon exists as three different isotopes: Ne-20, Ne-21, and Ne-22.Which isotope would be the most abundant in a sample of neon?

Accepted Answer

A) Ne-20 
B) Ne-21 
C) Ne-22 
D) All isotopes would be equally abundant. 
E) It is impossible to determine. 
A) Ne-20 
B) Ne-21 
C) Ne-22 
D) All isotopes would be equally abundant. 
E) It is impossible to determine.

Question 17

J.J.Thomson was the first to state that an atom is mostly empty space.

Accepted Answer

A) True 
 B)False

Question 18

Bohr was the first to use the term "orbit" to explain the fixed energy levels of electrons.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following correctly matches the ion with the total number of electrons in the ion?

Accepted Answer

A) Br- , 34 electrons 
B) Mg2+, 14 electrons 
C) Zn2+, 28 electrons 
D) P3-, 15 electrons 
E) H+, 2 electrons 
A) Br- , 34 electrons 
B) Mg2+, 14 electrons 
C) Zn2+, 28 electrons 
D) P3-, 15 electrons 
E) H+, 2 electrons

Question 20

All atoms of a particular element have identical chemical properties.

Accepted Answer

A) True 
 B)False

Exam 2: The Structure of the Atom and the Periodic Table

Americium-241 is an isotope used in smoke detectors.What is the composition of a neutral atom of Americium-241?

Which two scientists in 1869 arranged the elements in order of increasing atomic masses to form a precursor of the modern periodic table of elements?

Which of the following statements relating to Bohr's model of the hydrogen atom is FALSE?

Which statement correctly describes the basis for the octet rule?

Which of the following is a metal in the third period?

The modern periodic law states that the physical and chemical properties of the elements are periodic functions of what property?

Tungsten is a metal containing 74 protons, and is used widely in the electronics industry.What is the chemical symbol for tungsten?

What was J.J.Thomson?s important discovery about cathode rays in 1897?

Which of the following accounts for the fact that chlorine has an atomic mass of 35.45 amu rather than a whole number?

What is a horizontal row of elements on the periodic table called?

Europium (Eu) is a lanthanide element.

Which of the following elements is most likely to form a 2+ ion?

If an atom gains one electron, it becomes an anion.

In Rutherford's experiment, which led to the discovery of the atomic nucleus, what type of particle or ray was fired at the gold foil target?

What are the elements in the A-groups often called?

In nature, the element neon exists as three different isotopes: Ne-20, Ne-21, and Ne-22.Which isotope would be the most abundant in a sample of neon?

J.J.Thomson was the first to state that an atom is mostly empty space.

Bohr was the first to use the term "orbit" to explain the fixed energy levels of electrons.

Which of the following correctly matches the ion with the total number of electrons in the ion?

All atoms of a particular element have identical chemical properties.

Chemistry:methods and Measurement

Structure and Properties of Ionic and Covalent Compounds

Calculations, Chemical Changes, and the Chemical Equation

States of Matter- Gases, Liquids, and Solids

Solutions

Energy, Rate and Equilibrium

Acids and Bases

The Nucleus, Radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry- the Saturated Hydrocarbons

The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

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