Glencoe Chemistry: Matter and Change, Student Edition
Glencoe Chemistry: Matter and Change, Student Edition
1st Edition
ISBN: 9780076774609
Author: McGraw-Hill Education
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 4, Problem 116A
Interpretation Introduction

Interpretation:

The mass number, X, of the third isotope needs to be determined.

Concept introduction:

The isotope contains different numbers of neutron and same number of proton. So, the atomic mass of the isotope is different. The calculation of the atomic mass of elements is termed as the average atomic mass.

Averageatomicmass=(massofisotope×relativeabundance)

Expert Solution & Answer
Check Mark

Answer to Problem 116A

The mass number for the third isotope of magnesium is 26amu.

Explanation of Solution

Given information:

The abundances of the natural occurring isotopes are 79.0%,  10% and 11% for  M1224g, M1225g, M12Xg respectively.

Averageatomicmass=(massofM12g24×relativeabundance)+(massofM12g25×relativeabundance)+(massofM12gX×relativeabundance)

24.305 = (24)(0.790) + (25)(0.10) + X(0.11)

24.305 = 18.96 + 2.5 + X (0.11)

24.305  18.96  2.5 = X(0.11)

2.845 = X (0.11)

X= 26 amu

Conclusion

The value of X= 26 amu

Chapter 4 Solutions

Glencoe Chemistry: Matter and Change, Student Edition

Ch. 4.2 - Prob. 11SSCCh. 4.3 - Prob. 12PPCh. 4.3 - Prob. 13PPCh. 4.3 - Prob. 14PPCh. 4.3 - Prob. 15PPCh. 4.3 - Prob. 16PPCh. 4.3 - Prob. 17PPCh. 4.3 - Prob. 18PPCh. 4.3 - Prob. 19PPCh. 4.3 - Prob. 20SSCCh. 4.3 - Prob. 21SSCCh. 4.3 - Prob. 22SSCCh. 4.3 - Prob. 23SSCCh. 4.3 - Prob. 24SSCCh. 4.4 - Prob. 25SSCCh. 4.4 - Prob. 26SSCCh. 4.4 - Prob. 27SSCCh. 4.4 - Prob. 28SSCCh. 4.4 - Prob. 29SSCCh. 4 - Prob. 30ACh. 4 - Whose work is credited with being the beginning of...Ch. 4 - Prob. 32ACh. 4 - Prob. 33ACh. 4 - Prob. 34ACh. 4 - Prob. 35ACh. 4 - State the main points of Dalton’s atomic theory...Ch. 4 - Prob. 37ACh. 4 - Prob. 38ACh. 4 - What particles are found in the nucleus of an...Ch. 4 - How was the overall charge distributed in the plum...Ch. 4 - How did the charge distribution in the plum...Ch. 4 - Label the subatomic particles shown in Figure...Ch. 4 - Arrange the following subatomic particles in order...Ch. 4 - Explain why atoms are electrically neutral.Ch. 4 - What is the charge of the nucleus of element 89?Ch. 4 - Which particles account for most of an atom’s...Ch. 4 - Prob. 47ACh. 4 - Prob. 48ACh. 4 - Prob. 49ACh. 4 - Prob. 50ACh. 4 - Prob. 51ACh. 4 - Prob. 52ACh. 4 - Prob. 53ACh. 4 - Prob. 54ACh. 4 - Prob. 55ACh. 4 - Prob. 56ACh. 4 - Prob. 57ACh. 4 - How do isotopes of a given element differ? How are...Ch. 4 - How is an atom’s atomic number related to its...Ch. 4 - How is the mass number related to the number of...Ch. 4 - How can you determine the number of neutrons in an...Ch. 4 - Prob. 62ACh. 4 - Standard Units Define the atomic mass unit. What...Ch. 4 - Prob. 64ACh. 4 - Prob. 65ACh. 4 - How many protons and electrons are contained in an...Ch. 4 - Carbon A carbon atom has a mass number of 12 and...Ch. 4 - Mercury An isotope of mercury has 80 protons and...Ch. 4 - Xenon An isotope of xenon has an atomic number of...Ch. 4 - If an atom has 18 electrons, how many protons does...Ch. 4 - Sulfur Show that the atomic mass of the element...Ch. 4 - Prob. 72ACh. 4 - How many electrons, protons, and neutrons...Ch. 4 - How many electrons, protons, and neutrons are...Ch. 4 - Prob. 75ACh. 4 - Prob. 76ACh. 4 - Prob. 77ACh. 4 - Prob. 78ACh. 4 - Prob. 79ACh. 4 - Prob. 80ACh. 4 - Prob. 81ACh. 4 - Prob. 82ACh. 4 - Prob. 83ACh. 4 - Prob. 84ACh. 4 - Prob. 85ACh. 4 - Prob. 86ACh. 4 - Prob. 87ACh. 4 - Prob. 88ACh. 4 - Prob. 89ACh. 4 - Prob. 90ACh. 4 - Prob. 91ACh. 4 - Prob. 92ACh. 4 - Prob. 93ACh. 4 - Prob. 94ACh. 4 - Prob. 95ACh. 4 - Prob. 96ACh. 4 - Prob. 97ACh. 4 - Prob. 98ACh. 4 - Prob. 99ACh. 4 - Prob. 100ACh. 4 - Prob. 101ACh. 4 - Prob. 102ACh. 4 - Prob. 103ACh. 4 - Prob. 104ACh. 4 - Prob. 105ACh. 4 - Prob. 106ACh. 4 - Prob. 107ACh. 4 - Prob. 108ACh. 4 - Prob. 109ACh. 4 - Prob. 110ACh. 4 - Prob. 111ACh. 4 - Prob. 112ACh. 4 - Prob. 113ACh. 4 - Prob. 114ACh. 4 - Prob. 115ACh. 4 - Prob. 116ACh. 4 - Prob. 117ACh. 4 - Prob. 118ACh. 4 - Prob. 119ACh. 4 - Prob. 120ACh. 4 - Prob. 121ACh. 4 - Prob. 122ACh. 4 - Prob. 123ACh. 4 - Prob. 124ACh. 4 - Prob. 125ACh. 4 - Prob. 126ACh. 4 - Prob. 127ACh. 4 - Prob. 128ACh. 4 - Prob. 129ACh. 4 - Prob. 1STPCh. 4 - Prob. 2STPCh. 4 - Prob. 3STPCh. 4 - Prob. 4STPCh. 4 - Prob. 5STPCh. 4 - Prob. 6STPCh. 4 - Prob. 7STPCh. 4 - Prob. 8STPCh. 4 - Prob. 9STPCh. 4 - Prob. 10STPCh. 4 - Prob. 11STPCh. 4 - Prob. 12STPCh. 4 - Prob. 13STPCh. 4 - Prob. 14STPCh. 4 - Prob. 15STPCh. 4 - Prob. 16STPCh. 4 - Prob. 17STPCh. 4 - Prob. 18STPCh. 4 - Prob. 19STPCh. 4 - Prob. 20STPCh. 4 - Prob. 21STP
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