Question 1

In a chemical reaction,matter is neither created nor destroyed.Which law does this refer to?

Accepted Answer

A)   Law of Definite Proportions
B)   Law of the Conservation of Mass
C)   Law of Modern Atomic Theory
D)   Law of Multiple Proportions
E)   First Law of Thermodynamics

Question 2

How many protons are in nickel?

Accepted Answer

A)   28
B)   30
C)   31
D)   30.7
E)   58.7

Question 3

Predict the charge that an ion formed from tellerium would have.

Accepted Answer

A)   1-
B)   6-
C)   3-
D)   4-
E)   2-

Question 4

Identify the discovery that Millikan made.

Accepted Answer

A)   the mass of a proton
B)   the charge of a proton
C)   the charge of a single electron
D)   the mass of a beta particle
E)   molecules

Question 5

Which of the following elements is an alkaline earth metal?

Accepted Answer

A)   La
B)   P
C)   I
D)   Rb
E)   Ba

Question 6

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 7

Which of the following is an example of the law of multiple proportions?

Accepted Answer

A)   A sample of chlorine is found to contain three times as much Cl-35 as Cl-37.
B)   Two different compounds formed from carbon and oxygen have the following mass ratios: 1.33 g O: 1 g C and 2.66 g O: 1 g C.
C)   Two different samples of table salt are found to have the same ratio of sodium to chlorine.
D)   The atomic mass of bromine is found to be 79.90 amu.
E)   Nitrogen dioxide always has a mass ratio of 2.28 g O: 1 g N.

Question 8

Which of the following represent isotopes? A:  X B:  X C:  X D:  X

Accepted Answer

A)   A and D
B)   A and C
C)   B and D
D)   C and D
E)   all of the above

Question 9

How many iron atoms are contained in 354 g of iron?

Accepted Answer

A)   2.62 × 1025 Fe atoms
B)   2.13 × 1026 Fe atoms
C)   4.69 × 1024 Fe atoms
D)   3.82 × 1024 Fe atoms
E)   9.50 × 1022 Fe atoms

Question 10

How many Li atoms are contained in 97.9 g of Li?

Accepted Answer

A)   5.90 × 1025 Li atoms
B)   7.09 × 1021 Li atoms
C)   8.49 × 1024 Li atoms
D)   4.27 × 1022 Li atoms
E)   4.18 × 1024 Li atoms

Question 11

Are anions typically larger or smaller than their corresponding atom? Why?

Accepted Answer

Anions are larger than their correspondi...

Question 12

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

Accepted Answer

A)   dysprosium
B)   nickel
C)   terbium
D)   silicon
E)   copper

Question 13

Identify the element that has an atomic number of 40.

Accepted Answer

A)   neon
B)   calcium
C)   zirconium
D)   bromine
E)   gold

Question 14

Why doesn't a mass spectrum of silver have a peak at 107.9 amu?

Accepted Answer

The average atomic mass of sil...

Question 15

Predict the charge that an ion formed from nitrogen would have.

Accepted Answer

A)   1-
B)   6+
C)   3-
D)   3+
E)   2-

Question 16

Predict the charge that the ion formed from chlorine would have.

Accepted Answer

A)   1-
B)   2+
C)   1+
D)   4-
E)   3-

Question 17

Which element has the chemical symbol,Sn?

Accepted Answer

A)   samarium
B)   lead
C)   tin
D)   tungsten
E)   selenium

Question 18

Why do elements in the same group tend to have similar chemical properties?

Accepted Answer

Since elements in th...

Question 19

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 20

Which of the following is equal to exactly Avogadro's number of atoms?

Accepted Answer

A)   8.00 grams of oxygen
B)   35.38 grams of zinc
C)   12.01 grams of carbon
D)   11.99 grams of sodium
E)   34.00 grams of selenium

Exam 2: Atoms and Elements

How many iron atoms are contained in 354 g of iron?

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Why doesn't a mass spectrum of silver have a peak at 107.9 amu?

Correct AnswerverifiedThe average atomic mass of sil...View AnswerShow Answer

Why do elements in the same group tend to have similar chemical properties?

Correct AnswerverifiedSince elements in th...View AnswerShow Answer

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

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Which element has the chemical symbol,Sn?

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

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Predict the charge that an ion formed from tellerium would have.

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Predict the charge that an ion formed from nitrogen would have.

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Identify the discovery that Millikan made.

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How many Li atoms are contained in 97.9 g of Li?

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

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Identify the element that has an atomic number of 40.

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In a chemical reaction,matter is neither created nor destroyed.Which law does this refer to?

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Are anions typically larger or smaller than their corresponding atom? Why?

Correct AnswerverifiedAnions are larger than their correspondi...View AnswerShow Answer

Which of the following is equal to exactly Avogadro's number of atoms?

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Which of the following elements is an alkaline earth metal?

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Which of the following represent isotopes? A: X B: X C: X D: X

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How many protons are in nickel?

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Which of the following is an example of the law of multiple proportions?

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Predict the charge that the ion formed from chlorine would have.

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The average atomic mass of sil...
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Since elements in th...
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What species is represented by the following information? p⁺ = 47 n° = 62 e^- = 46

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Anions are larger than their correspondi...
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