Question 1

What does "X" represent in the following symbol?

Accepted Answer

A)  tin
B)  copper
C)  palladium
D)  niobium
E)  uranium

Question 2

Which of the following describes a metal?

Accepted Answer

A)  Poor conductor of heat
B)  Good conductor of electricity
C)  Tends to gain electrons
D)  Forms ionic compounds with group 18 elements
E)  Found on the upper right corner of the periodic table

Question 3

What species is represented by the following information? 
p+ = 47 n° = 62 e- = 46

Accepted Answer

A)  Ag+
B)  Nd
C)  Pd
D)  Ag
E)  Pd+

Question 4

How many moles of Kr are contained in 398 mg of Kr?

Accepted Answer

A)  4.75 × 10-3 moles Kr
B)  33.4 moles Kr
C)  2.11 × 10-4 moles Kr
D)  2.99 × 10-3 moles Kr
E)  1.19 × 10-4 moles Kr

Question 5

What element is defined by the following information?
 p+ = 17 n° = 20 e- = 17

Accepted Answer

A)  calcium
B)  rubidium
C)  chlorine
D)  neon
E)  oxygen

Question 6

An ion has 8 protons, 9 neutrons, and 10 electrons. The symbol for the ion is ________.

Accepted Answer

A)  17O2- 
B)  17O2+ 
C)  19F+ 
D)  19F- 
E)  17Ne2+

Question 7

Which of the following elements is a noble gas?

Accepted Answer

A)  Ar
B)  Br
C)  N
D)  O
E)  K

Question 8

What mass (in mg) does 2.63 moles of nickel have?

Accepted Answer

A)  44.8 mg
B)  2.23 × 104 mg
C)  129 mg
D)  3.56 × 105 mg
E)  1.54 × 105 mg

Question 9

Give an example of a halogen.

Accepted Answer

The answer of Give an example of a halogen....

Question 10

When forming an ion, fluorine, F, will ________ electron(s) .

Accepted Answer

A)  gain one
B)  gain two
C)  gain three
D)  lose one
E)  lose two

Question 11

Why do the isotopes of the same element have the same atomic size?

Accepted Answer

Isotopes only differ in the nu...

Question 12

What is the chemical symbol for copper?

Accepted Answer

A)  Co
B)  Cr
C)  Cu
D)  C

Question 13

When forming the nitride ion, nitrogen, N, will ________ electron(s) .

Accepted Answer

A)  gain one
B)  gain two
C)  gain three
D)  lose one
E)  lose two

Question 14

In which of the following sets do all species have the same number of electrons?

Accepted Answer

A)  F-, Ne, Mg2+
B)  Ge, Se2-, Br-
C)  K+, Rb+, Cs+
D)  Br, Br-, Br+

Question 15

Calculate the atomic mass of chromium if chromium has four naturally occurring isotopes with the following masses and natural abundances: 
Cr-50 49.9461 amu 4.35%
Cr-52 51.9405 amu 83.79%
Cr-53 52.9407 amu 9.50%
Cr-54 53.9389 amu 2.36%

Accepted Answer

A)  51.941 amu
B)  51.699 amu
C)  208.766 amu
D)  53.214 amu
E)  51.996 amu

Question 16

What species is represented by the following information?
 p+ = 17 n° = 18 e- = 18

Accepted Answer

A)  Cl
B)  Cl-
C)  Ar
D)  Ar+
E)  Kr

Question 17

How many electrons does the Al3+ ion possess?

Accepted Answer

A)  16
B)  10
C)  6
D)  0
E)  13

Question 18

How many silver atoms are contained in 3.75 moles of silver?

Accepted Answer

A)  6.23 × 1024 silver atoms
B)  2.26 × 1024 silver atoms
C)  1.61 × 1023 silver atoms
D)  2.44 × 1026 silver atoms
E)  6.50 × 1025 silver atoms

Question 19

Calculate the atomic mass of element "X" if it has two 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

Question 20

Which of the following elements is classified as a semimetal?

Accepted Answer

A)  calcium
B)  boron
C)  fluorine
D)  uranium

Exam 2: Atoms and Elements

When forming the nitride ion, nitrogen, N, will ________ electron(s) .

Correct AnswerverifiedShow Answer

What does "X" represent in the following symbol?

Correct AnswerverifiedShow Answer

What species is represented by the following information? p+ = 17 n° = 18 e- = 18

Correct AnswerverifiedShow Answer

How many silver atoms are contained in 3.75 moles of silver?

Correct AnswerverifiedShow Answer

How many moles of Kr are contained in 398 mg of Kr?

Correct AnswerverifiedShow Answer

Which of the following elements is a noble gas?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What mass (in mg) does 2.63 moles of nickel have?

Correct AnswerverifiedShow Answer

What is the chemical symbol for copper?

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How many electrons does the Al3+ ion possess?

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Which of the following describes a metal?

Correct AnswerverifiedShow Answer

Which of the following elements is classified as a semimetal?

Correct AnswerverifiedShow Answer

Give an example of a halogen.

Correct AnswerverifiedShow Answer

In which of the following sets do all species have the same number of electrons?

Correct AnswerverifiedShow Answer

An ion has 8 protons, 9 neutrons, and 10 electrons. The symbol for the ion is ________.

Correct AnswerverifiedShow Answer

What element is defined by the following information? p+ = 17 n° = 20 e- = 17

Correct AnswerverifiedShow Answer

Why do the isotopes of the same element have the same atomic size?

Correct AnswerverifiedIsotopes only differ in the nu...View AnswerShow Answer

What species is represented by the following information? p+ = 47 n° = 62 e- = 46

Correct AnswerverifiedShow Answer

When forming an ion, fluorine, F, will ________ electron(s) .

Correct AnswerverifiedShow Answer

Calculate the atomic mass of chromium if chromium has four naturally occurring isotopes with the following masses and natural abundances: Cr-50 49.9461 amu 4.35% Cr-52 51.9405 amu 83.79% Cr-53 52.9407 amu 9.50% Cr-54 53.9389 amu 2.36%

Correct AnswerverifiedShow Answer

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What species is represented by the following information? p⁺ = 17 n° = 18 e^- = 18

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How many electrons does the Al³⁺ ion possess?

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What element is defined by the following information? p⁺ = 17 n° = 20 e^- = 17

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Isotopes only differ in the nu...
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What species is represented by the following information? p⁺ = 47 n° = 62 e^- = 46

Correct Answer
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