Question 1

Electron affinity is

Accepted Answer

A) the energy required to remove an electron from an isolated atom. 
B) the force between two electrons in the same orbital. 
C) the force between two ions of opposite charge. 
D) the energy released when an isolated atom gains an electron. 
E) the attraction of an atom for an electron in a chemical bond. 
A) the energy required to remove an electron from an isolated atom. 
B) the force between two electrons in the same orbital. 
C) the force between two ions of opposite charge. 
D) the energy released when an isolated atom gains an electron. 
E) the attraction of an atom for an electron in a chemical bond.

Question 2

In Mendeleev's table, the elements were arranged according to their atomic mass.

Accepted Answer

A) True 
 B)False

Question 3

What is always true for a neutral atom?

Accepted Answer

A) There is an equal number of protons and neutrons. 
B) There is an equal number of protons and electrons. 
C) There is an equal number of protons, neutrons, and electrons. 
D) The number of protons and neutrons is an even number. 
E) The number of protons, neutrons, and electrons is an even number. 
A) There is an equal number of protons and neutrons. 
B) There is an equal number of protons and electrons. 
C) There is an equal number of protons, neutrons, and electrons. 
D) The number of protons and neutrons is an even number. 
E) The number of protons, neutrons, and electrons is an even number.

Question 4

What is the general name given to the elements of Group IA (1)?

Accepted Answer

A) halogens 
B) alkali metals 
C) alkaline earth metals 
D) noble gases 
E) metalloids 
A) halogens 
B) alkali metals 
C) alkaline earth metals 
D) noble gases 
E) metalloids

Question 5

What can be said about the possibility of the existence of the hydrogen isotope represented by the symbol shown below?

Accepted Answer

A) This isotope of hydrogen is not possible because it has no electrons. 
B) This isotope of hydrogen is not possible because atoms of hydrogen have one proton. 
C) This isotope of hydrogen is possible; it simply contains no protons and is an ion. 
D) This isotope of hydrogen is possible; it simply contains no neutrons. 
E) This isotope of hydrogen is possible; it simply has two neutrons. 
A) This isotope of hydrogen is not possible because it has no electrons. 
B) This isotope of hydrogen is not possible because atoms of hydrogen have one proton. 
C) This isotope of hydrogen is possible; it simply contains no protons and is an ion. 
D) This isotope of hydrogen is possible; it simply contains no neutrons. 
E) This isotope of hydrogen is possible; it simply has two neutrons.

Question 6

What kind(s) of particles can be found outside the nucleus of an atom?

Accepted Answer

A) protons 
B) neutrons 
C) electrons 
D) protons and electrons 
E) protons and neutrons 
A) protons 
B) neutrons 
C) electrons 
D) protons and electrons 
E) protons and neutrons

Question 7

Which sublevel has the lowest energy?

Accepted Answer

A) 2s 
B) 3p 
C) 4p 
D) 4s 
E) 2p 
A) 2s 
B) 3p 
C) 4p 
D) 4s 
E) 2p

Question 8

Sulfur (S) is one of the representative elements.

Accepted Answer

A) True 
 B)False

Question 9

Given that helium has an isotope   , how many electrons does an atom of this helium isotope contain?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 6 
E) 0 
A) 1 
B) 2 
C) 4 
D) 6 
E) 0

Question 10

The halogens, Group VII A (17), have the lowest ionization energies of any group in the periodic table.

Accepted Answer

A) True 
 B)False

Question 11

Which statement explains why isotopes have different mass numbers?

Accepted Answer

A) Isotopes differ in the number of protons each contains. 
B) Isotopes differ in the number of electrons each contains. 
C) Isotopes differ in the number of neutrons each contains. 
D) Isotopes differ in the number of protons and neutrons each contains. 
E) Isotopes differ in the number of protons and electrons each contains. 
A) Isotopes differ in the number of protons each contains. 
B) Isotopes differ in the number of electrons each contains. 
C) Isotopes differ in the number of neutrons each contains. 
D) Isotopes differ in the number of protons and neutrons each contains. 
E) Isotopes differ in the number of protons and electrons each contains.

Question 12

How many valence electrons are present in a chloride ion, Cl??

Accepted Answer

A) 5 
B) 7 
C) 8 
D) 17 
E) 18 
A) 5 
B) 7 
C) 8 
D) 17 
E) 18

Question 13

How many valence electrons are in Na, O and He, respectively?

Accepted Answer

A) 1, 6, 8 
B) 11, 8, 8 
C) 1, 6, 2 
D) 11, 8, 2 
E) 2, 4, 2 
A) 1, 6, 8 
B) 11, 8, 8 
C) 1, 6, 2 
D) 11, 8, 2 
E) 2, 4, 2

Question 14

What property of light is defined by the distance between identical points on adjacent waves?

Accepted Answer

A) energy 
B) speed 
C) wavelength 
D) spectrum 
E) amplitude 
A) energy 
B) speed 
C) wavelength 
D) spectrum 
E) amplitude

Question 15

Which statement about the modern periodic table is FALSE?

Accepted Answer

A) Elements are arranged in order of increasing atomic number. 
B) A period is a horizontal row of elements. 
C) A group is a vertical column of elements. 
D) A stepwise line separates the metals from the nonmetals; metals are to the left of the line, nonmetals are to the right of the line. 
E) Elements in the same period share similar chemical and physical properties. 
A) Elements are arranged in order of increasing atomic number. 
B) A period is a horizontal row of elements. 
C) A group is a vertical column of elements. 
D) A stepwise line separates the metals from the nonmetals; metals are to the left of the line, nonmetals are to the right of the line. 
E) Elements in the same period share similar chemical and physical properties.

Question 16

Who discovered the existence of the atomic nucleus?

Accepted Answer

A) Crookes 
B) Thomson 
C) Geiger 
D) Rutherford 
E) Bohr 
A) Crookes 
B) Thomson 
C) Geiger 
D) Rutherford 
E) Bohr

Question 17

Which of the following gives the correct charge of the ion according to the octet rule?

Accepted Answer

A) F+ 
B) Ba2- 
C) (S2-) 
D) P3+ 
E) C2+ 
A) F+ 
B) Ba2- 
C) (S2-) 
D) P3+ 
E) C2+

Question 18

There are eight valence electrons in a chlorine anion.

Accepted Answer

A) True 
 B)False

Question 19

Which best explains why an Al3+ ion is smaller than an Al atom?

Accepted Answer

A) In forming the Al3+ ion, the Al atom loses the electrons in its outermost energy level, causing a decrease in the atomic radius. 
B) In forming the Al3+ ion, the Al atom gains three protons and the resulting net positive charge keeps the electrons more strongly attracted to the nucleus, reducing the radius. 
C) The Al3+ ion contains more electrons than the Al atom, which results in a greater attraction for the nucleus and a smaller atomic radius. 
D) In forming the Al3+ ion, the Al atom adds electrons into a higher energy level, causing a decrease in the atomic radius. 
E) There are more protons in an Al3+ ion than there are in an Al atom. 
A) In forming the Al3+ ion, the Al atom loses the electrons in its outermost energy level, causing a decrease in the atomic radius. 
B) In forming the Al3+ ion, the Al atom gains three protons and the resulting net positive charge keeps the electrons more strongly attracted to the nucleus, reducing the radius. 
C) The Al3+ ion contains more electrons than the Al atom, which results in a greater attraction for the nucleus and a smaller atomic radius. 
D) In forming the Al3+ ion, the Al atom adds electrons into a higher energy level, causing a decrease in the atomic radius. 
E) There are more protons in an Al3+ ion than there are in an Al atom.

Question 20

Valence electrons are involved when atoms form bonds.

Accepted Answer

A) True 
 B)False

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

Electron affinity is

In Mendeleev's table, the elements were arranged according to their atomic mass.

What is always true for a neutral atom?

What is the general name given to the elements of Group IA (1)?

What can be said about the possibility of the existence of the hydrogen isotope represented by the symbol shown below?

What kind(s) of particles can be found outside the nucleus of an atom?

Which sublevel has the lowest energy?

Sulfur (S) is one of the representative elements.

Given that helium has an isotope , how many electrons does an atom of this helium isotope contain?

The halogens, Group VII A (17), have the lowest ionization energies of any group in the periodic table.

Which statement explains why isotopes have different mass numbers?

How many valence electrons are present in a chloride ion, Cl??

How many valence electrons are in Na, O and He, respectively?

What property of light is defined by the distance between identical points on adjacent waves?

Which statement about the modern periodic table is FALSE?

Who discovered the existence of the atomic nucleus?

Which of the following gives the correct charge of the ion according to the octet rule?

There are eight valence electrons in a chlorine anion.

Which best explains why an Al3+ ion is smaller than an Al atom?

Valence electrons are involved when atoms form bonds.

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

Filters

How many valence electrons are present in a chloride ion, Cl^??

Which best explains why an Al³⁺ ion is smaller than an Al atom?