90 Electrons. neutrons 2. Yttrium was discovered in 1794. It is one of the elements used in superconductors. How many electrons, neutrons, and protons are in an atom of yttrium-88? 39 Electrons, 50 neutrons, 39 Protons
90 Electrons. neutrons 2. Yttrium was discovered in 1794. It is one of the elements used in superconductors. How many electrons, neutrons, and protons are in an atom of yttrium-88? 39 Electrons, 50 neutrons, 39 Protons
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter5: Stoichiometry
Section: Chapter Questions
Problem 44E: The stable isotopes of iron arc 54Fe, 56Fe, 57Fe, and 58Fe. The mass spectrum of iron looks like the...
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Question
![17 Electrons
/
By 90
18 neutrons,
142 neutrons.
Electrons
17 protons
protons.
90
2. Yttrium was discovered in 1794. It is one of the elements used in superconductors. How many electrons,
neutrons, and protons are in an atom of yttrium-88?
39 Electrons,
50
neutrons,
Protons
neutrons
15 protons
b. phosphorus-32 17 neutrons
28 protons
30 neutrons
c. nickel-63
39
3. How many neutrons and protons are there in each of the following nuclides?
77
Protons
6
8
a. carbon-14
d. iridium-192 115 neutrons
Protons
Percentage
0.350%
2.27%
11.56%
11.55%
56.90%
17.37%
26 Protons
e. iron-54 28
neutrons
93 Protons
f. neptunium-235 93 neutrons
4. Find the average atomic mass of silver if 51.83% of the silver atoms occurring in nature have mass
106.905 u and 48.17% of the atoms have mass 108.905 u.
5. Find the average atomic mass of krypton if the relative amounts are as follows.
Isotopic mass
77.920 u
79.916 u
81.913 u
82.914 u
83.912 u
85.911 u
6. A particular atom of potassium contains 19 protons, 19 electrons, and 20 neutrons. What is the atomic
number of this atom? What is its mass number? Write the symbol for this potassium nucleus.
7. How did the discovery of subatomic particles and isotopes affect Dalton's theories?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F50b257a9-40dc-439c-8fa8-493264676059%2F1dc7d547-5f14-45c6-8c2d-3e994b08b777%2Fqfko1jy_processed.jpeg&w=3840&q=75)
Transcribed Image Text:17 Electrons
/
By 90
18 neutrons,
142 neutrons.
Electrons
17 protons
protons.
90
2. Yttrium was discovered in 1794. It is one of the elements used in superconductors. How many electrons,
neutrons, and protons are in an atom of yttrium-88?
39 Electrons,
50
neutrons,
Protons
neutrons
15 protons
b. phosphorus-32 17 neutrons
28 protons
30 neutrons
c. nickel-63
39
3. How many neutrons and protons are there in each of the following nuclides?
77
Protons
6
8
a. carbon-14
d. iridium-192 115 neutrons
Protons
Percentage
0.350%
2.27%
11.56%
11.55%
56.90%
17.37%
26 Protons
e. iron-54 28
neutrons
93 Protons
f. neptunium-235 93 neutrons
4. Find the average atomic mass of silver if 51.83% of the silver atoms occurring in nature have mass
106.905 u and 48.17% of the atoms have mass 108.905 u.
5. Find the average atomic mass of krypton if the relative amounts are as follows.
Isotopic mass
77.920 u
79.916 u
81.913 u
82.914 u
83.912 u
85.911 u
6. A particular atom of potassium contains 19 protons, 19 electrons, and 20 neutrons. What is the atomic
number of this atom? What is its mass number? Write the symbol for this potassium nucleus.
7. How did the discovery of subatomic particles and isotopes affect Dalton's theories?
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