Question 1

How many electrons are in a neutral atom of bromine-81?

Accepted Answer

A)  1
B)  35
C)  36
D)  81

Question 2

Which of the following elements is an alkaline earth metal?

Accepted Answer

A)  Cs
B)  Cu
C)  Mg
D)  Ti
E)  Br

Question 3

What does "X" represent in the following symbol?  3580X{ } _ { 35 } ^ { 80 } \mathrm { X }3580​X

Accepted Answer

A)  mercury
B)  chlorine
C)  scandium
D)  bromine
E)  selenium

Question 4

Cesium belongs to the ________ group of the periodic table.

Accepted Answer

A)  alkali metal
B)  alkaline earth metal
C)  halogen
D)  noble gas

Question 5

Give the name of the instrument that is used to measure masses of atoms and the percent abundance of isotopes.

Accepted Answer

The answer of Give the name of the instrument that...

Question 6

Which of the following elements is a main-group metal?

Accepted Answer

A)  Si
B)  Sm
C)  W
D)  Pb
E)  Ge

Question 7

When forming an ion,iodine,I,will ________ electron(s) .

Accepted Answer

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

Question 8

When forming an ion,sodium,Na,will ________ electron(s) .

Accepted Answer

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

Question 9

Identify the charges of protons,neutrons,and electrons.

Accepted Answer

A)  protons +1,neutrons 0,electrons -1
B)  protons 0,neutrons -1,electrons +1
C)  protons -1,neutrons 0,electrons +1
D)  protons 0,neutrons +1,electrons -1
E)  protons +1,neutrons -1,electrons 0

Question 10

How many atoms are in 1.00 kg of copper?

Accepted Answer

A)  3.83 × 1029 atoms
B)  3.83 × 1022 atoms
C)  15.74 atoms
D)  2.61 × 10-23 atoms
E)  9.48 × 1024 atoms

Question 11

How many electrons are in arsenic?

Accepted Answer

A)  33
B)  41
C)  42
D)  41.9
E)  75

Question 12

Determine the number of protons,neutrons,and electrons in the following:  2965X{ } _ { 29 } ^ { 65 } \mathrm { X }2965​X

Accepted Answer

A)  p+ = 36 n° = 29 e- = 36
B)  p+ = 29 n° = 29 e- = 36
C)  p+ = 36 n° = 36 e- = 29
D)  p+ = 29 n° = 36 e- = 29
E)  p+ = 29 n° = 36 e- = 36

Question 13

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

Accepted Answer

The average atomic mass of sil...

Question 14

Predict the charge of the most stable ion of chlorine.

Accepted Answer

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

Question 15

What is the average mass,in grams,of one atom of carbon?

Accepted Answer

A)  5.01 × 10-22 g
B)  5.01 × 1022 g
C)  1.38 × 10-25 g
D)  1.99 × 10-23 g
E)  1.99 × 1023 g

Question 16

Identify the symbol for silver.

Accepted Answer

A)  S
B)  Si
C)  Ar
D)  Ag
E)  Sl

Question 17

What is the atomic mass for cadmium?

Accepted Answer

A)  48
B)  112.41
C)  40.08
D)  20

Question 18

Which of the following contains the most atoms? You shouldn't need to do a calculation here.

Accepted Answer

A)  10.0 g Ne
B)  10.0 g He
C)  10.0 g Ar
D)  10.0 g Kr
E)  10.0 g Mg

Question 19

Identify the element that has an atomic number of 40.

Accepted Answer

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

Question 20

How many moles of Cs are contained in 595 kg of Cs?

Accepted Answer

A)  2.23 × 102 moles Cs
B)  4.48 × 103 moles Cs
C)  7.91 × 104 moles Cs
D)  1.26 × 103 moles Cs
E)  5.39 × 102 moles Cs

Exam 2: Atoms and Elements

How many moles of Cs are contained in 595 kg of Cs?

Correct AnswerverifiedShow Answer

Which of the following elements is a main-group metal?

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What does "X" represent in the following symbol? 3580X{ } _ { 35 } ^ { 80 } \mathrm { X }3580​X

Correct AnswerverifiedShow Answer

Identify the charges of protons,neutrons,and electrons.

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What is the atomic mass for cadmium?

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Which of the following elements is an alkaline earth metal?

Correct AnswerverifiedShow Answer

Give the name of the instrument that is used to measure masses of atoms and the percent abundance of isotopes.

Correct AnswerverifiedShow Answer

When forming an ion,sodium,Na,will ________ electron(s) .

Correct AnswerverifiedShow Answer

Which of the following contains the most atoms? You shouldn't need to do a calculation here.

Correct AnswerverifiedShow Answer

How many electrons are in a neutral atom of bromine-81?

Correct AnswerverifiedShow Answer

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

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

Determine the number of protons,neutrons,and electrons in the following: 2965X{ } _ { 29 } ^ { 65 } \mathrm { X }2965​X

Correct AnswerverifiedShow Answer

How many atoms are in 1.00 kg of copper?

Correct AnswerverifiedShow Answer

Identify the element that has an atomic number of 40.

Correct AnswerverifiedShow Answer

Predict the charge of the most stable ion of chlorine.

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Cesium belongs to the ________ group of the periodic table.

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What is the average mass,in grams,of one atom of carbon?

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When forming an ion,iodine,I,will ________ electron(s) .

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Identify the symbol for silver.

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How many electrons are in arsenic?

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What does "X" represent in the following symbol? ${ } _ { 35 } ^ { 80 } \mathrm { X }$

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The average atomic mass of sil...
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Determine the number of protons,neutrons,and electrons in the following: ${ } _ { 29 } ^ { 65 } \mathrm { X }$

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