Question 1

The nucleus is composed of _____.

Accepted Answer

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

Question 2

Which of the following colors has the lowest energy?

Accepted Answer

A)  red 
B)  orange 
C)  yellow 
D)  green 
E)  blue 
A)  red 
B)  orange 
C)  yellow 
D)  green 
E)  blue

Question 3

How many electrons are in a neutral atom of element X? ​   ​

Accepted Answer

A)  25 
B)  56 
C)  81 
D)  31 
E)  None of the above values is the number of electrons. 
A)  25 
B)  56 
C)  81 
D)  31 
E)  None of the above values is the number of electrons.

Question 4

Iodine-131 has a half-life of 8 days.How many half-lives have passed after 24 days?

Accepted Answer

A)  1 half-life 
B)  2 half-lives 
C)  3 half-lives 
D)  4 half-lives 
E)  5 half-lives 
A)  1 half-life 
B)  2 half-lives 
C)  3 half-lives 
D)  4 half-lives 
E)  5 half-lives

Question 5

The average atomic mass of zirconium is ​
​
Isotope
Natural abundance
A
90Zr
52%
B
91Zr
11%
C
92Zr
17%
D
94Zr
17%
E
96Zr
3%
​

Accepted Answer

A)  less than 90 because the atomic mass only depends on the number of protons in the atom. 
B)  90 because 90Zn has the highest natural abundance. 
C)  greater than 90 but less than 96 because the atomic mass takes into account the abundance of all naturally occurring isotopes. 
D)  96 because the atomic mass is the mass of the highest naturally occurring isotope. 
E)  greater than 96 because the atomic mass is the sum of masses of the naturally occurring isotopes. 
A)  less than 90 because the atomic mass only depends on the number of protons in the atom. 
B)  90 because 90Zn has the highest natural abundance. 
C)  greater than 90 but less than 96 because the atomic mass takes into account the abundance of all naturally occurring isotopes. 
D)  96 because the atomic mass is the mass of the highest naturally occurring isotope. 
E)  greater than 96 because the atomic mass is the sum of masses of the naturally occurring isotopes.

Question 6

Which electron energy level is closest to the nucleus of the atom? ​

Accepted Answer

A)  n = 1 
B)  n = 2 
C)  n = 3 
D)  n = 4 
E)  All electrons are equally close to the nucleus. 
A)  n = 1 
B)  n = 2 
C)  n = 3 
D)  n = 4 
E)  All electrons are equally close to the nucleus.

Question 7

Most of the micronutrients are

Accepted Answer

A)  transition metals. 
B)  metalloids. 
C)  nonmetals. 
D)  alkali earth metals. 
E)  noble gases. 
A)  transition metals. 
B)  metalloids. 
C)  nonmetals. 
D)  alkali earth metals. 
E)  noble gases.

Question 8

The periods are the _____ of the periodic table.

Accepted Answer

A)  transition metals 
B)  halogens 
C)  rows 
D)  columns 
E)  numbers 
A)  transition metals 
B)  halogens 
C)  rows 
D)  columns 
E)  numbers

Question 9

According to the periodic table, which of the following sets of terms accurately describes potassium? ​
Nonmetal Halogen Alkali metal Group 2A
I II III IV

Accepted Answer

A)  I only 
B)  III only 
C)  I and II 
D)  II and IV 
E)  III and IV 
A)  I only 
B)  III only 
C)  I and II 
D)  II and IV 
E)  III and IV

Question 10

Which electron energy level is lowest in energy? ​

Accepted Answer

A)  n = 1 
B)  n = 2 
C)  n = 3 
D)  n = 4 
E)  All electrons are equal in energy. 
A)  n = 1 
B)  n = 2 
C)  n = 3 
D)  n = 4 
E)  All electrons are equal in energy.

Question 11

What is a micronutrient?

Accepted Answer

A)  an element required at only certain times during your life 
B)  an essential element needed in quantities less than 10 g/day 
C)  an essential element needed in quantities less than 100 mg/day 
D)  a nonessential element, useful in small quantities 
E)  nutrients needed in large quantities 
A)  an element required at only certain times during your life 
B)  an essential element needed in quantities less than 10 g/day 
C)  an essential element needed in quantities less than 100 mg/day 
D)  a nonessential element, useful in small quantities 
E)  nutrients needed in large quantities

Question 12

In a balanced nuclear reaction, which of the following is consistent with the release of a gamma particle?

Accepted Answer

A)  The identity of the atom does not change. 
B)  All radioactive decay releases gamma radiation. 
C)  The mass number decreases by 4. 
D)  The atomic number increases by 1. 
E)  The atomic number decreases by 1. 
A)  The identity of the atom does not change. 
B)  All radioactive decay releases gamma radiation. 
C)  The mass number decreases by 4. 
D)  The atomic number increases by 1. 
E)  The atomic number decreases by 1.

Question 13

What is the identity of element X? ​   ​

Accepted Answer

A)  xenon 
B)  manganese 
C)  gold 
D)  copper 
E)  iron 
A)  xenon 
B)  manganese 
C)  gold 
D)  copper 
E)  iron

Question 14

According to the current model of the atom, the part of the diagram labeled B is made up of

Accepted Answer

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

Question 15

A nuclear equation is balanced when the ______ is equal on both sides of the equation.

Accepted Answer

A)  identity of the atoms 
B)  charges on the atoms 
C)  identity of the radioactive particles 
D)  sum of the atomic numbers 
E)  sum of the atomic and mass numbers 
A)  identity of the atoms 
B)  charges on the atoms 
C)  identity of the radioactive particles 
D)  sum of the atomic numbers 
E)  sum of the atomic and mass numbers

Question 16

The symbol   is used to represent a(n)

Accepted Answer

A)  proton. 
B)  alpha particle. 
C)  gamma ray. 
D)  beta particle. 
E)  neutron. 
A)  proton. 
B)  alpha particle. 
C)  gamma ray. 
D)  beta particle. 
E)  neutron.

Question 17

According the graph, what percent of radium-226 remains after three half-lives?

Accepted Answer

A)  100% 
B)  50% 
C)  25% 
D)  12.5% 
E)  6.25% 
A)  100% 
B)  50% 
C)  25% 
D)  12.5% 
E)  6.25%

Question 18

Which of the following types of radiation can be stopped by light clothing?

Accepted Answer

A)  beta particles 
B)  alpha particles 
C)  gamma rays 
D)  x-rays 
E)  All of the above radiation can be stopped by light clothing. 
A)  beta particles 
B)  alpha particles 
C)  gamma rays 
D)  x-rays 
E)  All of the above radiation can be stopped by light clothing.

Question 19

According to the periodic table, what types of elements are in group 8A?

Accepted Answer

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

Question 20

An element is a solid at room temperature and a shiny, metallic gray.However, it is a poor conductor of electricity and temperature, and it is also brittle.Which element fits this description?

Accepted Answer

A)  oxygen 
B)  lithium 
C)  helium 
D)  antimony 
E)  iron 
A)  oxygen 
B)  lithium 
C)  helium 
D)  antimony 
E)  iron

The nucleus is composed of _____.

Which of the following colors has the lowest energy?

How many electrons are in a neutral atom of element X?

Iodine-131 has a half-life of 8 days.How many half-lives have passed after 24 days?

The average atomic mass of zirconium is Isotope Natural abundance A ⁹⁰Zr 52% B ⁹¹Zr 11% C ⁹²Zr 17% D ⁹⁴Zr 17% E ⁹⁶Zr 3%

Which electron energy level is closest to the nucleus of the atom?

Most of the micronutrients are

The periods are the _____ of the periodic table.

According to the periodic table, which of the following sets of terms accurately describes potassium? Nonmetal Halogen Alkali metal Group 2A I II III IV

Which electron energy level is lowest in energy?

What is a micronutrient?

In a balanced nuclear reaction, which of the following is consistent with the release of a gamma particle?

What is the identity of element X?

According to the current model of the atom, the part of the diagram labeled B is made up of

A nuclear equation is balanced when the ______ is equal on both sides of the equation.

The symbol is used to represent a(n)

According the graph, what percent of radium-226 remains after three half-lives?

Which of the following types of radiation can be stopped by light clothing?

According to the periodic table, what types of elements are in group 8A?

An element is a solid at room temperature and a shiny, metallic gray.However, it is a poor conductor of electricity and temperature, and it is also brittle.Which element fits this description?

Matter, Energy, and Measurement

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 2: Atomic Structure and Radioisotopes

The nucleus is composed of _____.

Which of the following colors has the lowest energy?

How many electrons are in a neutral atom of element X? ​ ​

Iodine-131 has a half-life of 8 days.How many half-lives have passed after 24 days?

The average atomic mass of zirconium is ​ ​ Isotope Natural abundance A 90Zr 52% B 91Zr 11% C 92Zr 17% D 94Zr 17% E 96Zr 3% ​

Which electron energy level is closest to the nucleus of the atom? ​

Most of the micronutrients are

The periods are the _____ of the periodic table.

According to the periodic table, which of the following sets of terms accurately describes potassium? ​ Nonmetal Halogen Alkali metal Group 2A I II III IV

Which electron energy level is lowest in energy? ​

What is a micronutrient?

In a balanced nuclear reaction, which of the following is consistent with the release of a gamma particle?

What is the identity of element X? ​ ​

According to the current model of the atom, the part of the diagram labeled B is made up of

A nuclear equation is balanced when the ______ is equal on both sides of the equation.

The symbol is used to represent a(n)

According the graph, what percent of radium-226 remains after three half-lives?

Which of the following types of radiation can be stopped by light clothing?

According to the periodic table, what types of elements are in group 8A?

An element is a solid at room temperature and a shiny, metallic gray.However, it is a poor conductor of electricity and temperature, and it is also brittle.Which element fits this description?

Matter, Energy, and Measurement

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

How many electrons are in a neutral atom of element X?

The average atomic mass of zirconium is Isotope Natural abundance A ⁹⁰Zr 52% B ⁹¹Zr 11% C ⁹²Zr 17% D ⁹⁴Zr 17% E ⁹⁶Zr 3%

Which electron energy level is closest to the nucleus of the atom?

According to the periodic table, which of the following sets of terms accurately describes potassium? Nonmetal Halogen Alkali metal Group 2A I II III IV

Which electron energy level is lowest in energy?

What is the identity of element X?