Question 1

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

Question 2

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

Accepted Answer

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

Question 3

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

Question 4

How many electrons can occupy the 2s subshell?

Accepted Answer

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

Question 5

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

Question 6

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.

Question 7

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.

Question 8

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

Question 9

The mass number of Bromine-81 is

Accepted Answer

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

Question 10

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

Question 11

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

Question 12

The symbol of the element with 23 protons is

Accepted Answer

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

Question 13

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.

Question 14

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

Question 15

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 16

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.

Question 17

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

Question 18

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

Accepted Answer

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

Question 19

Which of the following subshells consists of five orbitals?

Accepted Answer

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

Question 20

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.

Exam 2: Atoms and the Periodic Table

The ground state electron configuration for nickel is

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

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Which characteristics correctly describe a neutron?

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Which characteristics correctly describe a proton?

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

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Which of the following subshells consists of five orbitals?

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Elements in the Periodic Table are arranged according to

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

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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.

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

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

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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.

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

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

Correct AnswerverifiedThe electron configuration allows us to ...View AnswerShow Answer

How many electrons can occupy the 2s subshell?

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The symbol of the element with 23 protons is

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The mass number of Bromine-81 is

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

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

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The electron configuration for phosphorus is

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

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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.

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

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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.

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The element with the electron configuration 1s²2s²2p⁴ is

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The electron configuration allows us to ...
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An atom with Z = 26 and A = 58 contains protons and neutrons.

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