Question 1

What is the value of the mass number in the isotope   ?

Accepted Answer

A) 53 
B) 78 
C) 126.9 
D) 131 
E) 184 
A) 53 
B) 78 
C) 126.9 
D) 131 
E) 184

Question 2

Niels Bohr developed a theory that accounted for the lines in the visible region of the hydrogen spectrum.

Accepted Answer

A) True 
 B)False

Question 3

Why do atoms gain and lose electrons to have eight electrons in the valence shell?

Accepted Answer

A) Atoms/ions are stable when the n=2 principal level is full. 
B) Atoms/ions are stable when the s and p sublevels of the valence shell are full. 
C) Atoms/ions are stable when the d sublevel of the valence shell is full. 
D) Atoms/ions are stable when the n=4 principal level is full. 
E) Atoms/ions are stable when the s, p, and d sublevels of the 2nd level are full. 
A) Atoms/ions are stable when the n=2 principal level is full. 
B) Atoms/ions are stable when the s and p sublevels of the valence shell are full. 
C) Atoms/ions are stable when the d sublevel of the valence shell is full. 
D) Atoms/ions are stable when the n=4 principal level is full. 
E) Atoms/ions are stable when the s, p, and d sublevels of the 2nd level are full.

Question 4

Which ion is NOT isoelectronic (i.e.has the same electron configuration) with Ar? The electron configuration of Ar is shown.

Accepted Answer

A) Cl− 
B) K+ 
C) Br− 
D) Ca2+ 
E) S2− 
A) Cl− 
B) K+ 
C) Br− 
D) Ca2+ 
E) S2−

Question 5

There are nine periods on the periodic table.

Accepted Answer

A) True 
 B)False

Question 6

Hydrogen can form two different ions: a hydrogen ion (H+), and a hydride ion (H−).Which statement concerning these ions is FALSE?

Accepted Answer

A) The H+ ion is a cation formed by the loss of one electron; this ion has no valence electrons. 
B) The H− ion is an anion formed by the gain of one electron; this ion has a full n=1 energy level. 
C) The hydrogen ion and the hydride ion are isotopes. 
D) The hydrogen ion and the hydride ion have the same number of protons. 
E) The hydrogen ion and the hydride ion have different sizes. 
A) The H+ ion is a cation formed by the loss of one electron; this ion has no valence electrons. 
B) The H− ion is an anion formed by the gain of one electron; this ion has a full n=1 energy level. 
C) The hydrogen ion and the hydride ion are isotopes. 
D) The hydrogen ion and the hydride ion have the same number of protons. 
E) The hydrogen ion and the hydride ion have different sizes.

Question 7

What is the ground state (shorthand) electron configuration of Se?

Accepted Answer

A) [Kr] 
B) [Ar]4s2 4p4 
C) [Kr]4s2 4p4 
D) [Ar]4s2 4d10 4p6 
E) [Ar]4s2 3d10 4p4 
A) [Kr] 
B) [Ar]4s2 4p4 
C) [Kr]4s2 4p4 
D) [Ar]4s2 4d10 4p6 
E) [Ar]4s2 3d10 4p4

Question 8

Which of the following ions does not follow the octet rule?

Accepted Answer

A) Na+ 
B) Ca2+ 
C) Al3+ 
D) N3- 
E) Cl2- 
A) Na+ 
B) Ca2+ 
C) Al3+ 
D) N3- 
E) Cl2-

Question 9

The first experimentally based theory of atomic structure was proposed by John Dalton.

Accepted Answer

A) True 
 B)False

Question 10

The atomic number of an ion indicates the number of protons that are present.

Accepted Answer

A) True 
 B)False

Question 11

Atoms of the noble gas elements, Group VIII A (18), do not readily bond to other elements.

Accepted Answer

A) True 
 B)False

Question 12

Which statement concerning atoms is FALSE?

Accepted Answer

A) The atomic number of an atom is the number of protons it contains. 
B) The mass number of an atom is the sum of the number of protons, neutrons, and electrons it contains. 
C) The nucleus of an atom contains its protons and neutrons, and is positively charged. 
D) The nucleus of an atom is the heaviest part of the atom. 
E) Electrons reside outside the nucleus in what is called the electron cloud. 
A) The atomic number of an atom is the number of protons it contains. 
B) The mass number of an atom is the sum of the number of protons, neutrons, and electrons it contains. 
C) The nucleus of an atom contains its protons and neutrons, and is positively charged. 
D) The nucleus of an atom is the heaviest part of the atom. 
E) Electrons reside outside the nucleus in what is called the electron cloud.

Question 13

What is FALSE about the three orbitals in the 2p sublevel?

Accepted Answer

A) The orbitals have the same dumbbell-like shape. 
B) The orbitals have similar, but different energies. 
C) The orbitals are the same distance away from the nucleus. 
D) The orbitals are each oriented in a different direction. 
E) Each orbital can hold two electrons with opposite spins. 
A) The orbitals have the same dumbbell-like shape. 
B) The orbitals have similar, but different energies. 
C) The orbitals are the same distance away from the nucleus. 
D) The orbitals are each oriented in a different direction. 
E) Each orbital can hold two electrons with opposite spins.

Question 14

Which of the following is a representative nonmetal?

Accepted Answer

A) P 
B) K 
C) Si 
D) Ni 
E) Al 
A) P 
B) K 
C) Si 
D) Ni 
E) Al

Question 15

An atom cannot be created, divided, destroyed, or converted to any other type of atom.

Accepted Answer

A) True 
 B)False

Question 16

Which isotope of hydrogen has two neutrons?

Accepted Answer

A) hydrogen-1 
B) hydrogen-2 
C) hydrogen-3 
D) deuterium 
E) H2 
A) hydrogen-1 
B) hydrogen-2 
C) hydrogen-3 
D) deuterium 
E) H2

Question 17

What are valence electrons?

Accepted Answer

A) the electrons located in the nucleus of an atom 
B) the interior electrons, located closest to the nucleus 
C) the outermost electrons in an atom 
D) the electrons with the lowest energy in an atom 
E) the total number of electrons in an atom 
A) the electrons located in the nucleus of an atom 
B) the interior electrons, located closest to the nucleus 
C) the outermost electrons in an atom 
D) the electrons with the lowest energy in an atom 
E) the total number of electrons in an atom

Question 18

What is the energy required to remove an electron from an isolated atom?

Accepted Answer

A) electron affinity 
B) electronegativity 
C) ionization energy 
D) kinetic energy 
E) potential energy 
A) electron affinity 
B) electronegativity 
C) ionization energy 
D) kinetic energy 
E) potential energy

Question 19

Which period contains the element sodium?

Accepted Answer

A) one 
B) two 
C) three 
D) five 
E) eleven 
A) one 
B) two 
C) three 
D) five 
E) eleven

Question 20

In modern atomic theory, Bohr's orbits are replaced by atomic orbitals.What is an atomic orbital?

Accepted Answer

A) a circular path around the nucleus travelled by an electron 
B) a dense, positively charged region of space at the center of an atom 
C) a region of space within an atom where there is a high probability of finding an electron 
D) the outermost principle energy level in an atom 
E) the lowest energy arrangement of electrons in an atom 
A) a circular path around the nucleus travelled by an electron 
B) a dense, positively charged region of space at the center of an atom 
C) a region of space within an atom where there is a high probability of finding an electron 
D) the outermost principle energy level in an atom 
E) the lowest energy arrangement of electrons in an atom

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

What is the value of the mass number in the isotope ?

Niels Bohr developed a theory that accounted for the lines in the visible region of the hydrogen spectrum.

Why do atoms gain and lose electrons to have eight electrons in the valence shell?

Which ion is NOT isoelectronic (i.e.has the same electron configuration) with Ar? The electron configuration of Ar is shown.

There are nine periods on the periodic table.

Hydrogen can form two different ions: a hydrogen ion (H+), and a hydride ion (H−).Which statement concerning these ions is FALSE?

What is the ground state (shorthand) electron configuration of Se?

Which of the following ions does not follow the octet rule?

The first experimentally based theory of atomic structure was proposed by John Dalton.

The atomic number of an ion indicates the number of protons that are present.

Atoms of the noble gas elements, Group VIII A (18), do not readily bond to other elements.

Which statement concerning atoms is FALSE?

What is FALSE about the three orbitals in the 2p sublevel?

Which of the following is a representative nonmetal?

An atom cannot be created, divided, destroyed, or converted to any other type of atom.

Which isotope of hydrogen has two neutrons?

What are valence electrons?

What is the energy required to remove an electron from an isolated atom?

Which period contains the element sodium?

In modern atomic theory, Bohr's orbits are replaced by atomic orbitals.What is an atomic orbital?

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

Hydrogen can form two different ions: a hydrogen ion (H⁺), and a hydride ion (H⁻).Which statement concerning these ions is FALSE?