Question 1

The ground state electron configuration for nickel is

Accepted Answer

A) 1s2 2s2 2p6 3s2 3p6 3d10. 
B) 1s2 2s2 2p6 3s2 4s2 3d10 4p4. 
C) 1s2 2s2 2p6 3s2 3p6 4s2 4d8. 
D) 1s2 2s2 2p6 3s2 3p6 4s2 3d8. 
A) 1s2 2s2 2p6 3s2 3p6 3d10. 
B) 1s2 2s2 2p6 3s2 4s2 3d10 4p4. 
C) 1s2 2s2 2p6 3s2 3p6 4s2 4d8. 
D) 1s2 2s2 2p6 3s2 3p6 4s2 3d8.

Question 2

The value of Z for 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 3

An atom with Z = 26 and A = 58 contains ________ protons and ________ neutrons.

Accepted Answer

A) 26;58 
B) 58;26 
C) 26;32 
D) 32;26 
E) 26;84 
A) 26;58 
B) 58;26 
C) 26;32 
D) 32;26 
E) 26;84

Question 4

An imaginary element Xz consists of two isotopes having masses of 100.0 amu and 102.0 amu.A sample of Xz was found to contain 75.0% of the 100Xz isotope and 25.0% of the 102Xz.Calculate the atomic weight of Xz.

Accepted Answer

A) 100.3 amu 
B) 100.5 amu 
C) 101.0 amu 
D) 101.5 amu 
E) 101.8 amu 
A) 100.3 amu 
B) 100.5 amu 
C) 101.0 amu 
D) 101.5 amu 
E) 101.8 amu

Question 5

The mass number of Bromine-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 6

The shell having n = 3 contains ________ subshells,________ orbitals,and up to ________ electrons

Accepted Answer

A) 2;4;8 
B) 3;6;12 
C) 3;6;18 
D) 3;9;18 
E) 3;12;36 
A) 2;4;8 
B) 3;6;12 
C) 3;6;18 
D) 3;9;18 
E) 3;12;36

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

Question 8

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 9

Explain how the term "valence electrons" is related to electron configurations.Use the elements in group VI,Periods,3,4,and 5,as examples.

Accepted Answer

The electron configuration allows us to

Question 10

The electron configuration for phosphorus is

Accepted Answer

A) 1s2 1p6 2s2 2p5. 
B) 1s2 2s2 2p6 3p5. 
C) 1s2 2s2 2p6 3s4 3p1. 
D) 2s2 2p6 3s2 3p5. 
E) 1s22s22p63s23p3. 
A) 1s2 1p6 2s2 2p5. 
B) 1s2 2s2 2p6 3p5. 
C) 1s2 2s2 2p6 3s4 3p1. 
D) 2s2 2p6 3s2 3p5. 
E) 1s22s22p63s23p3.

Question 11

Which characteristics correctly describe a proton?

Accepted Answer

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

Question 12

What fourth period element is represented by the dot structure shown?

Accepted Answer

A) K 
B) Ca 
C) Mn 
D) Br 
E) Co 
A) K 
B) Ca 
C) Mn 
D) Br 
E) Co

Question 13

Which of the following subshells consists of five orbitals?

Accepted Answer

A) 4s 
B) 4p 
C) 4d 
D) 4f 
E) none of the above 
A) 4s 
B) 4p 
C) 4d 
D) 4f 
E) none of the above

Question 14

Elements in the Periodic Table are arranged according to

Accepted Answer

A) alphabetical order. 
B) atomic number. 
C) atomic weight. 
D) date of discovery. 
E) number of neutrons. 
A) alphabetical order. 
B) atomic number. 
C) atomic weight. 
D) date of discovery. 
E) number of neutrons.

Question 15

How many electrons can occupy the 2s subshell?

Accepted Answer

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

Question 16

The symbol of the element with 23 protons is

Accepted Answer

A) Mg. 
B) Na. 
C) V. 
D) B. 
E) none of the above 
A) Mg. 
B) Na. 
C) V. 
D) B. 
E) none of the above

Question 17

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 18

The atomic number of an atom containing 29 protons,29 electrons,and 34 neutrons is

Accepted Answer

A) 5. 
B) 29. 
C) 34. 
D) 58. 
E) 63. 
A) 5. 
B) 29. 
C) 34. 
D) 58. 
E) 63.

Question 19

At maximum,an f subshell can hold ________ electrons,a d subshell can hold ________ electrons and a p subshell can hold ________ electrons.

Accepted Answer

A) 14;10;6 
B) 2;8;18 
C) 18;8;2 
D) 2;12,;21 
E) 14;6;10 
A) 14;10;6 
B) 2;8;18 
C) 18;8;2 
D) 2;12,;21 
E) 14;6;10

Question 20

Naturally occurring iron contains 5.82% 54Fe,91.66% 56Fe,2.19% 57Fe,and 0.33% 58Fe.The respective atomic masses are 53.940 amu,55.935 amu,56.935 amu,and 57.933 amu.Calculate the average atomic mass of iron.

Accepted Answer

Exam 2: Atoms and the Periodic Table

The ground state electron configuration for nickel is

The value of Z for an atom containing 47 protons,47 electrons,and 60 neutrons is

An atom with Z = 26 and A = 58 contains ________ protons and ________ neutrons.

An imaginary element Xz consists of two isotopes having masses of 100.0 amu and 102.0 amu.A sample of Xz was found to contain 75.0% of the 100Xz isotope and 25.0% of the 102Xz.Calculate the atomic weight of Xz.

The mass number of Bromine-81 is

The shell having n = 3 contains ________ subshells,________ orbitals,and up to ________ electrons

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

Which characteristics correctly describe a neutron?

Explain how the term "valence electrons" is related to electron configurations.Use the elements in group VI,Periods,3,4,and 5,as examples.

The electron configuration for phosphorus is

Which characteristics correctly describe a proton?

What fourth period element is represented by the dot structure shown?

Which of the following subshells consists of five orbitals?

Elements in the Periodic Table are arranged according to

How many electrons can occupy the 2s subshell?

The symbol of the element with 23 protons is

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

The atomic number of an atom containing 29 protons,29 electrons,and 34 neutrons is

At maximum,an f subshell can hold ________ electrons,a d subshell can hold ________ electrons and a p subshell can hold ________ electrons.

Naturally occurring iron contains 5.82% 54Fe,91.66% 56Fe,2.19% 57Fe,and 0.33% 58Fe.The respective atomic masses are 53.940 amu,55.935 amu,56.935 amu,and 57.933 amu.Calculate the average atomic mass of iron.

Matter and Measurements

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Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

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Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

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An atom with Z = 26 and A = 58 contains protons and neutrons.

An imaginary element Xz consists of two isotopes having masses of 100.0 amu and 102.0 amu.A sample of Xz was found to contain 75.0% of the ¹⁰⁰Xz isotope and 25.0% of the ¹⁰²Xz.Calculate the atomic weight of Xz.

The shell having n = 3 contains subshells, orbitals,and up to electrons

The element with the electron configuration 1s²2s²2p⁴ is

At maximum,an f subshell can hold electrons,a d subshell can hold electrons and a p subshell can hold electrons.

Naturally occurring iron contains 5.82% ⁵⁴Fe,91.66% ⁵⁶Fe,2.19% ⁵⁷Fe,and 0.33% ⁵⁸Fe.The respective atomic masses are 53.940 amu,55.935 amu,56.935 amu,and 57.933 amu.Calculate the average atomic mass of iron.