Question 1

Which statement is incorrect according to modern atomic theory?

Accepted Answer

A) Some sugars have the formula C3.5H7O3.5. 
B) An atom of 14N has the same approximate mass as an atom of 14C. 
C) An atom of 14N behaves differently in chemical reactions than an atom of 14C. 
D) An example of a chemical reaction is CaCO3 → CaO + CO2. 
E) C2H6 and C3H8 are both possible compounds of carbon and hydrogen. 
A) Some sugars have the formula C3.5H7O3.5. 
B) An atom of 14N has the same approximate mass as an atom of 14C. 
C) An atom of 14N behaves differently in chemical reactions than an atom of 14C. 
D) An example of a chemical reaction is CaCO3 → CaO + CO2. 
E) C2H6 and C3H8 are both possible compounds of carbon and hydrogen. A

Question 2

Adding one neutron to the nucleus of an atom

Accepted Answer

A) converts it to an isotope of the same element. 
B) increases its atomic mass by two units,but does not change its atomic number. 
C) increases its atomic number by one unit but does not change its atomic mass. 
D) does not change either its atomic number or its atomic mass. 
E) converts it to an atom of a different element. 
A) converts it to an isotope of the same element. 
B) increases its atomic mass by two units,but does not change its atomic number. 
C) increases its atomic number by one unit but does not change its atomic mass. 
D) does not change either its atomic number or its atomic mass. 
E) converts it to an atom of a different element. A

Question 3

The number of valence electrons in a main group element is given by ________.

Accepted Answer

A) the element's atomic number 
B) the element's atomic weight 
C) the element's group number 
D) none of the above 
A) the element's atomic number 
B) the element's atomic weight 
C) the element's group number 
D) none of the above C

Question 4

The element with the electron configuration 1s2 2s2 2p4 is ________.

Accepted Answer

A) Be 
B) C 
C) O 
D) Si 
E) S 
A) Be 
B) C 
C) O 
D) Si 
E) S

Question 5

Which of the following is an alkali metal?

Accepted Answer

A) Al 
B) Cl 
C) He 
D) Na 
E) O 
A) Al 
B) Cl 
C) He 
D) Na 
E) O

Question 6

An isotope with 15 protons and 17 neutrons will have which symbol?

Accepted Answer

A) 
 
Cl 
B) 
 
Cl 
C) 
 
P 
D) 
 
P 
E) 
 
P 
A) 
 
Cl 
B) 
 
Cl 
C) 
 
P 
D) 
 
P 
E) 
 
P

Question 7

Hydrogen exists as three isotopes.These isotopes differ by the number of ________ contained in the atom.

Accepted Answer

A) neutrons 
B) protons 
C) electrons 
D) charges 
A) neutrons 
B) protons 
C) electrons 
D) charges

Question 8

How many electrons can occupy the 4s subshell?

Accepted Answer

A) 1 
B) 2 
C) 6 
D) 8 
E) 10 
A) 1 
B) 2 
C) 6 
D) 8 
E) 10

Question 9

How many electrons can occupy the 4d subshell?

Accepted Answer

A) 1 
B) 2 
C) 6 
D) 8 
E) 10 
A) 1 
B) 2 
C) 6 
D) 8 
E) 10

Question 10

The atomic number of an atom containing 47 protons,47 electrons,and 60 neutrons is

Accepted Answer

A) 13. 
B) 47. 
C) 60. 
D) 107. 
E) 154. 
A) 13. 
B) 47. 
C) 60. 
D) 107. 
E) 154.

Question 11

Which group contains only f-block elements?

Accepted Answer

A) Ni,Pd,Pt 
B) Si,Ge,As 
C) Ce,Pr,Nd 
D) Kr,Xe,Rn 
E) Po,Fr,Ac 
A) Ni,Pd,Pt 
B) Si,Ge,As 
C) Ce,Pr,Nd 
D) Kr,Xe,Rn 
E) Po,Fr,Ac

Question 12

Adding one proton to the nucleus of an atom

Accepted Answer

A) converts it to an isotope of the same element. 
B) increases its atomic mass by one unit,but does not change its atomic number. 
C) increases its atomic number by one unit but does not change its atomic mass. 
D) does not change either its atomic number or its atomic mass. 
E) converts it to an atom of a different element. 
A) converts it to an isotope of the same element. 
B) increases its atomic mass by one unit,but does not change its atomic number. 
C) increases its atomic number by one unit but does not change its atomic mass. 
D) does not change either its atomic number or its atomic mass. 
E) converts it to an atom of a different element.

Question 13

The correct order for filling orbitals with electrons is ________.

Accepted Answer

A) 1s,2s,2p,3s,3d,4s,3p 
B) 1s,2s,3s,4s,2p,3p,3d 
C) 1s,2s,2p,3s,3p,4s,3d 
D) 1s,2s,3d,2p,3p,3s,4s 
A) 1s,2s,2p,3s,3d,4s,3p 
B) 1s,2s,3s,4s,2p,3p,3d 
C) 1s,2s,2p,3s,3p,4s,3d 
D) 1s,2s,3d,2p,3p,3s,4s

Question 14

Atoms of  
Cl contain ________ protons and ________ electrons.

Accepted Answer

A) 17; 17 
B) 17; 18 
C) 18; 17 
D) 35; 18 
E) 35; 17 
A) 17; 17 
B) 17; 18 
C) 18; 17 
D) 35; 18 
E) 35; 17

Question 15

Another name for atomic mass unit (amu)is the

Accepted Answer

A) avogadro. 
B) dalton. 
C) Kekule 
D) kelvin. 
E) mendeleev. 
A) avogadro. 
B) dalton. 
C) Kekule 
D) kelvin. 
E) mendeleev.

Question 16

The mass number of Br-81 is ________.

Accepted Answer

A) 81 
B) 79.904 
C) 79 
D) 46 
E) 35 
A) 81 
B) 79.904 
C) 79 
D) 46 
E) 35

Question 17

Which elements all belong in the same group?

Accepted Answer

A) C,N,O 
B) Fe,Cu,Ni 
C) B,Si,As 
D) F,Cl,Br 
E) Al,Ge,Sb 
A) C,N,O 
B) Fe,Cu,Ni 
C) B,Si,As 
D) F,Cl,Br 
E) Al,Ge,Sb

Question 18

Which characteristics correctly describe a neutron?

Accepted Answer

A) approximate mass 1 amu; charge +1; inside nucleus 
B) approximate mass 1 amu; charge -1; inside nucleus 
C) approximate mass 1 amu; charge 0; inside nucleus 
D) approximate mass 5 × 10-4 amu; charge 0; inside nucleus 
E) approximate mass 5 × 10-4 amu; charge -1; outside nucleus 
A) approximate mass 1 amu; charge +1; inside nucleus 
B) approximate mass 1 amu; charge -1; inside nucleus 
C) approximate mass 1 amu; charge 0; inside nucleus 
D) approximate mass 5 × 10-4 amu; charge 0; inside nucleus 
E) approximate mass 5 × 10-4 amu; charge -1; outside nucleus

Question 19

What is the maximum number of electrons that can occupy the 3d orbitals?

Accepted Answer

A) 2 
B) 6 
C) 8 
D) 10 
E) 14 
A) 2 
B) 6 
C) 8 
D) 10 
E) 14

Question 20

Which group contains only d-block elements?

Accepted Answer

A) Ni,Pd,Pt 
B) Si,Ge,As 
C) Ce,Pr,Nd 
D) Kr,Xe,Rn 
E) Po,Fr,Ac 
A) Ni,Pd,Pt 
B) Si,Ge,As 
C) Ce,Pr,Nd 
D) Kr,Xe,Rn 
E) Po,Fr,Ac

Exam 2: Atoms and the Periodic Table

Which statement is incorrect according to modern atomic theory?

Adding one neutron to the nucleus of an atom

The number of valence electrons in a main group element is given by ________.

The element with the electron configuration 1s2 2s2 2p4 is ________.

Which of the following is an alkali metal?

An isotope with 15 protons and 17 neutrons will have which symbol?

Hydrogen exists as three isotopes.These isotopes differ by the number of ________ contained in the atom.

How many electrons can occupy the 4s subshell?

How many electrons can occupy the 4d subshell?

The atomic number of an atom containing 47 protons,47 electrons,and 60 neutrons is

Which group contains only f-block elements?

Adding one proton to the nucleus of an atom

The correct order for filling orbitals with electrons is ________.

Atoms of Cl contain ________ protons and ________ electrons.

Another name for atomic mass unit (amu)is the

The mass number of Br-81 is ________.

Which elements all belong in the same group?

Which characteristics correctly describe a neutron?

What is the maximum number of electrons that can occupy the 3d orbitals?

Which group contains only d-block elements?

Matter and Measurements

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

The element with the electron configuration 1s²2s²2p⁴ is ________.

Atoms of Cl contain protons and electrons.