Question 1

What element is defined by the following information?
P+ = 11 n° = 12 e- = 11

Accepted Answer

A)  sodium 
B)  vanadium 
C)  magnesium 
D)  titanium 
A)  sodium 
B)  vanadium 
C)  magnesium 
D)  titanium

Question 2

An atom of 17O contains ________ protons.

Accepted Answer

A)  8 
B)  25 
C)  9 
D)  11 
E)  17 
A)  8 
B)  25 
C)  9 
D)  11 
E)  17

Question 3

All statements about scientific theories are true EXCEPT

Accepted Answer

A)  they explain why nature behaves the way it does. 
B)  they must have the ability to make predictions on future behavior. 
C)  they should use observations to test the theory. 
D)  they are derived from hypothesis. 
E)  they are speculation. 
A)  they explain why nature behaves the way it does. 
B)  they must have the ability to make predictions on future behavior. 
C)  they should use observations to test the theory. 
D)  they are derived from hypothesis. 
E)  they are speculation.

Question 4

Calculate the mass (in kg)of 4.87 × 1025 atoms of Zn.

Accepted Answer

A)  5.29 kg 
B)  1.89 kg 
C)  8.09 kg 
D)  1.24 kg 
E)  1.09 kg 
A)  5.29 kg 
B)  1.89 kg 
C)  8.09 kg 
D)  1.24 kg 
E)  1.09 kg

Question 5

The atomic number for iron is

Accepted Answer

A)  192.22 
B)  77 
C)  55.85 
D)  26 
A)  192.22 
B)  77 
C)  55.85 
D)  26

Question 6

Calculate the atomic mass of element "X," if it has 2 naturally occurring isotopes with the following masses and natural abundances. X-45 44.8776 amu 32.88%
X-47 46.9443 amu 67.12%

Accepted Answer

A)  46.26 amu 
B)  45.91 amu 
C)  46.34 amu 
D)  46.84 amu 
E)  44.99 amu 
A)  46.26 amu 
B)  45.91 amu 
C)  46.34 amu 
D)  46.84 amu 
E)  44.99 amu

Question 7

Two or more substances in variable proportions,where the composition is constant throughout are

Accepted Answer

A)  a compound. 
B)  an element. 
C)  a heterogeneous mixture. 
D)  a homogeneous mixture. 
E)  a crystalline solid. 
A)  a compound. 
B)  an element. 
C)  a heterogeneous mixture. 
D)  a homogeneous mixture. 
E)  a crystalline solid.

Question 8

What does "X" represent in the following symbol?   X

Accepted Answer

A)  selenium 
B)  krypton 
C)  sulfur 
D)  bromine 
E)  chlorine 
A)  selenium 
B)  krypton 
C)  sulfur 
D)  bromine 
E)  chlorine

Question 9

Identify the element that has an atomic number of 20.

Accepted Answer

A)  boron 
B)  neon 
C)  calcium 
D)  zinc 
A)  boron 
B)  neon 
C)  calcium 
D)  zinc

Question 10

How are gases different from solids and liquids?

Accepted Answer

A)  Gases can only be made up of atoms. 
B)  The particles in a gas attract each other much more strongly than in solids and liquids. 
C)  Gases are compressible. 
D)  Only gases can take the shape of their container. 
E)  Gases are colorless. 
A)  Gases can only be made up of atoms. 
B)  The particles in a gas attract each other much more strongly than in solids and liquids. 
C)  Gases are compressible. 
D)  Only gases can take the shape of their container. 
E)  Gases are colorless.

Question 11

Choose the pure substance from the list below.

Accepted Answer

A)  sea water 
B)  diamond 
C)  air 
D)  coffee 
E)  milk 
A)  sea water 
B)  diamond 
C)  air 
D)  coffee 
E)  milk

Question 12

Gallium has an atomic mass of 69.723 amu.The Ga-69 (68.926 amu)is 60.111%.What is the amu of the other isotope?

Accepted Answer

A)  70.924 amu 
B)  70.932 amu 
C)  70.928 amu 
D)  70.920 amu 
A)  70.924 amu 
B)  70.932 amu 
C)  70.928 amu 
D)  70.920 amu

Question 13

Identify the characteristics of a liquid.

Accepted Answer

A)  definite volume and definite shape 
B)  definite volume and no definite shape 
C)  no definite shape and definite volume 
D)  no definite shape and no definite volume 
A)  definite volume and definite shape 
B)  definite volume and no definite shape 
C)  no definite shape and definite volume 
D)  no definite shape and no definite volume

Question 14

Which of the following statements about subatomic particles is TRUE?

Accepted Answer

A)  A neutral atom contains the same number of protons and electrons. 
B)  Protons have about the same mass as electrons. 
C)  Electrons make up most of the mass of an atom. 
D)  Protons and neutrons have opposite, but equal in magnitude, charges. 
E)  Neutrons and electrons are found in the nucleus of an atom. 
A)  A neutral atom contains the same number of protons and electrons. 
B)  Protons have about the same mass as electrons. 
C)  Electrons make up most of the mass of an atom. 
D)  Protons and neutrons have opposite, but equal in magnitude, charges. 
E)  Neutrons and electrons are found in the nucleus of an atom.

Question 15

Identify the characteristics of a solid.

Accepted Answer

A)  definite volume and definite shape 
B)  definite volume and no definite shape 
C)  no definite shape and definite volume 
D)  no definite shape and no definite volume 
A)  definite volume and definite shape 
B)  definite volume and no definite shape 
C)  no definite shape and definite volume 
D)  no definite shape and no definite volume

Question 16

Calculate the atomic mass of magnesium if magnesium has 3 naturally occurring stable isotopes with the following masses and natural abundances. Mg-24 23.9996 amu 78.99%
Mg-25 24.9858 amu 10.00%
Mg-26 25.9826 amu 11.01%

Accepted Answer

A)  22.53 amu 
B)  24.32 amu 
C)  24.86 amu 
D)  25.41 amu 
E)  23.92 amu 
A)  22.53 amu 
B)  24.32 amu 
C)  24.86 amu 
D)  25.41 amu 
E)  23.92 amu

Question 17

Give the composition of hydrogen peroxide.

Accepted Answer

A)  two hydrogen atoms and two oxygen atoms 
B)  one hydrogen atom and one oxygen atom 
C)  two hydrogen atoms and one oxygen atom 
D)  one hydrogen atom and two oxygen atoms 
A)  two hydrogen atoms and two oxygen atoms 
B)  one hydrogen atom and one oxygen atom 
C)  two hydrogen atoms and one oxygen atom 
D)  one hydrogen atom and two oxygen atoms

What element is defined by the following information? P⁺ = 11 n° = 12 e^- = 11

An atom of ¹⁷O contains ________ protons.

All statements about scientific theories are true EXCEPT

Calculate the mass (in kg)of 4.87 × 10²⁵ atoms of Zn.

The atomic number for iron is

Calculate the atomic mass of element "X," if it has 2 naturally occurring isotopes with the following masses and natural abundances. X-45 44.8776 amu 32.88% X-47 46.9443 amu 67.12%

Two or more substances in variable proportions,where the composition is constant throughout are

What does "X" represent in the following symbol? X

Identify the element that has an atomic number of 20.

How are gases different from solids and liquids?

Choose the pure substance from the list below.

Gallium has an atomic mass of 69.723 amu.The Ga-69 (68.926 amu)is 60.111%.What is the amu of the other isotope?

Identify the characteristics of a liquid.

Which of the following statements about subatomic particles is TRUE?

Identify the characteristics of a solid.

Calculate the atomic mass of magnesium if magnesium has 3 naturally occurring stable isotopes with the following masses and natural abundances. Mg-24 23.9996 amu 78.99% Mg-25 24.9858 amu 10.00% Mg-26 25.9826 amu 11.01%

Give the composition of hydrogen peroxide.

Essentials: Units, Measurements, and Problem Solving

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

Exam 2: Atoms

What element is defined by the following information? P+ = 11 n° = 12 e- = 11

An atom of 17O contains ________ protons.

All statements about scientific theories are true EXCEPT

Calculate the mass (in kg)of 4.87 × 1025 atoms of Zn.

The atomic number for iron is

Calculate the atomic mass of element "X," if it has 2 naturally occurring isotopes with the following masses and natural abundances. X-45 44.8776 amu 32.88% X-47 46.9443 amu 67.12%

Two or more substances in variable proportions,where the composition is constant throughout are

What does "X" represent in the following symbol? X

Identify the element that has an atomic number of 20.

How are gases different from solids and liquids?

Choose the pure substance from the list below.

Gallium has an atomic mass of 69.723 amu.The Ga-69 (68.926 amu)is 60.111%.What is the amu of the other isotope?

Identify the characteristics of a liquid.

Which of the following statements about subatomic particles is TRUE?

Identify the characteristics of a solid.

Calculate the atomic mass of magnesium if magnesium has 3 naturally occurring stable isotopes with the following masses and natural abundances. Mg-24 23.9996 amu 78.99% Mg-25 24.9858 amu 10.00% Mg-26 25.9826 amu 11.01%

Give the composition of hydrogen peroxide.

Essentials: Units, Measurements, and Problem Solving

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

What element is defined by the following information? P⁺ = 11 n° = 12 e^- = 11

An atom of ¹⁷O contains ________ protons.

Calculate the mass (in kg)of 4.87 × 10²⁵ atoms of Zn.