Question 1

What Group IA (1)ion has the electronic arrangement shown 1s22s22p6

Accepted Answer

A) lithium ion 
B) sodium ion 
C) potassium ion 
D) magnesium ion 
E) calcium ion 
A) lithium ion 
B) sodium ion 
C) potassium ion 
D) magnesium ion 
E) calcium ion

Question 2

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 3

What does the mass number minus the atomic number represent?

Accepted Answer

A) number of protons 
B) number of electrons 
C) number of neutrons 
D) number of protons - number of neutrons 
E) number of neutrons - number of protons 
A) number of protons 
B) number of electrons 
C) number of neutrons 
D) number of protons - number of neutrons 
E) number of neutrons - number of protons

Question 4

Given that helium has an isotope 4
2 He,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 5

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 6

In the calcium atom represented by the symbol $40$
20 Ca,there are 20 protons,20 neutrons,and 20 electrons.

Accepted Answer

A) True 
 B)False

Question 7

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 8

What can be said about the possibility of the existence of the hydrogen isotope represented by the symbol shown below? $\begin{array} { l } 
2 \
2
\end{array}$ H

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 9

Which describes the basic concept of Bohr's theory of the atom?

Accepted Answer

A) Atoms contain a small,dense positively charged region called the nucleus. 
B) The energy of an electron in an atom is quantized; it has only certain allowable values. 
C) Light is made up of particles called photons. 
D) Electrons have the magnetic property of spin. 
E) Radioactive atoms spontaneously decay and release large amounts of energy from the nucleus. 
A) Atoms contain a small,dense positively charged region called the nucleus. 
B) The energy of an electron in an atom is quantized; it has only certain allowable values. 
C) Light is made up of particles called photons. 
D) Electrons have the magnetic property of spin. 
E) Radioactive atoms spontaneously decay and release large amounts of energy from the nucleus.

Question 10

Which one of the following elements has the highest electron affinity?

Accepted Answer

A) Li 
B) K 
C) Kr 
D) O 
E) Cl 
A) Li 
B) K 
C) Kr 
D) O 
E) Cl

Question 11

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 12

What is the ground state electron configuration of sulfur,whose atomic number is 16?

Accepted Answer

A) 1s21p62s22p6 
B) 1s22s22p62d6 
C) 1s22s22p63s23p4 
D) 1s22s22p63s23d4 
E) 1s22s22p63s22d4 
A) 1s21p62s22p6 
B) 1s22s22p62d6 
C) 1s22s22p63s23p4 
D) 1s22s22p63s23d4 
E) 1s22s22p63s22d4

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

The identity of an atom is determined by which of the following?

Accepted Answer

A) the number of electrons it contains 
B) its mass number 
C) the number of isotopes it has 
D) the number of protons it contains 
E) the number of protons and neutrons it contains 
A) the number of electrons it contains 
B) its mass number 
C) the number of isotopes it has 
D) the number of protons it contains 
E) the number of protons and neutrons it contains

Question 15

Cations tend to be formed from metal atoms,while anions are formed from non-metal atoms.

Accepted Answer

A) True 
 B)False

Question 16

Sulfur (S)is one of the representative elements.

Accepted Answer

A) True 
 B)False

Question 17

Who stated that the elements,when arranged according to their atomic masses,showed a distinct periodicity of their properties?

Accepted Answer

A) Dmitri Mendeleev 
B) Niels Bohr 
C) J.J Thomson 
D) Ernest Rutherford 
E) John Dalton 
A) Dmitri Mendeleev 
B) Niels Bohr 
C) J.J Thomson 
D) Ernest Rutherford 
E) John Dalton

Question 18

The Aufbau Principle specifies which of the following?

Accepted Answer

A) Each atomic orbital has a maximum capacity of two electrons. 
B) Two electrons in the same orbital must have opposite spins. 
C) Two electrons in the same orbital must be spin paired. 
D) Electrons will occupy the lowest energy orbitals that are available. 
E) Electrons will half-fill orbitals of equal energy,before any become completely filled. 
A) Each atomic orbital has a maximum capacity of two electrons. 
B) Two electrons in the same orbital must have opposite spins. 
C) Two electrons in the same orbital must be spin paired. 
D) Electrons will occupy the lowest energy orbitals that are available. 
E) Electrons will half-fill orbitals of equal energy,before any become completely filled.

Question 19

What term is used for the elements straddling the "staircase" boundary between the metals and nonmetals?

Accepted Answer

A) transition elements 
B) metalloids 
C) cations 
D) lanthanides 
E) noble gases 
A) transition elements 
B) metalloids 
C) cations 
D) lanthanides 
E) noble gases

Question 20

What ion carries two negative charges and is isoelectronic with K+?

Accepted Answer

A) O2- 
B) S2- 
C) F2- 
D) Cl2- 
E) Ar2- 
A) O2- 
B) S2- 
C) F2- 
D) Cl2- 
E) Ar2-

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

What Group IA (1)ion has the electronic arrangement shown 1s22s22p6

Which statement explains why isotopes have different mass numbers?

What does the mass number minus the atomic number represent?

Given that helium has an isotope 4 2 He,how many electrons does an atom of this helium isotope contain?

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

In the calcium atom represented by the symbol 404040 20 Ca,there are 20 protons,20 neutrons,and 20 electrons.

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

What can be said about the possibility of the existence of the hydrogen isotope represented by the symbol shown below? 2 2 H

Which describes the basic concept of Bohr's theory of the atom?

Which one of the following elements has the highest electron affinity?

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?

What is the ground state electron configuration of sulfur,whose atomic number is 16?

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

The identity of an atom is determined by which of the following?

Cations tend to be formed from metal atoms,while anions are formed from non-metal atoms.

Sulfur (S)is one of the representative elements.

Who stated that the elements,when arranged according to their atomic masses,showed a distinct periodicity of their properties?

The Aufbau Principle specifies which of the following?

What term is used for the elements straddling the "staircase" boundary between the metals and nonmetals?

What ion carries two negative charges and is isoelectronic with K+?

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 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

What Group IA (1)ion has the electronic arrangement shown 1s²2s²2p⁶

In the calcium atom represented by the symbol $40$ 20 Ca,there are 20 protons,20 neutrons,and 20 electrons.

What ion carries two negative charges and is isoelectronic with K⁺?