Concept explainers
(a)
Interpretation:
The number of protons, the number of neutrons and the number of electrons in Silver-115 has to be given.
Concept introduction;
Atomic number of an element is the number of protons found in the nucleus of every atom of that element.
Mass number (A):
Mass number of an element is defined as the total number of protons and neutrons in an atom.
Protons:
A proton is one of three main particles that make up the atom. Protons are a tiny, dense region at the center of the atom. Protons have a positive electrical charge of
Neutrons:
Atoms of all elements except for most atoms of hydrogen have neutrons in their nucleus. Unlike protons and electrons, which are electrically charged, neutrons have no charge they are electrically neutral.
Electrons:
Electrons have an electric charge of
(a)
Explanation of Solution
Given,
The mass number of silver is
The atomic number of silver is
The number of proton is,
Thus, the number of protons in the atom is
The number of electrons is,
Thus, the number of electrons in the atom is
The number of neutrons can be calculated as,
The number of neutrons in an atom is
(b)
Interpretation:
The number of protons, the number of neutrons and the number of electrons in Gold-197 has to be given.
Concept introduction;
Refer to part (a).
(b)
Explanation of Solution
Given,
The atomic number of gold is
The mass number of gold is
The number of proton is,
Thus, the number of protons in the atom is
The number of electron is,
Thus, the number of electrons in the atom is
The number of neutrons can be calculated as,
The number of neutrons in an atom is
(c)
Interpretation:
The number of protons, the number of neutrons and the number of electrons in Radon-222 has to be given.
Concept introduction;
Refer to part (a).
(c)
Explanation of Solution
Given,
The atomic number of radon is
The mass number of radon is
The number of proton is,
Thus, the number of protons in the atom is
The number of electron is,
Thus, the number of electrons in the atom is
The number of neutrons can be calculated as,
The number of neutrons in an atom is
(d)
Interpretation:
The number of protons, the number of neutrons and the number of electrons in osmium,-192 has to be given.
Concept introduction;
Refer to part (a).
(d)
Explanation of Solution
Given,
The atomic number of radon is
The mass number of radon is
The number of proton is,
Thus, the number of protons in the atom is
The number of electron is,
Thus, the number of electrons in the atom is
The number of neutrons can be calculated as,
The number of neutrons in an atom is
Want to see more full solutions like this?
Chapter 2 Solutions
Connect 1-Semester Online Access for Principles of General, Organic & Biochemistry
- Arrange the following in the order of increasing mass. (a) a potassium ion, K+ (b) a phosphorus molecule, P4 (c) a potassium atom (d) a platinum atomarrow_forwardGive the complete symbol(ZAX), including atomic number and mass number, of (a) a nickel atom with 31 neutrons, (b) a plutonium atom with 150 neutrons, and (c) a tungsten atom with 110 neutrons.arrow_forwardGive the complete symbol (XZA), including atomic number and mass number, of (a) a nickel atom with 31 neutrons, and (b) a tungsten atom with 110 neutrons.arrow_forward
- 2-73 (Chemical Connections 2D) Copper is a soft metal. how can it be made harder?arrow_forward2-69 (Chemical Connections 2A) Why does the body need sulfur, calcium, and iron?arrow_forwardThe photo here depicts what happens when a coil of magnesium ribbon and a few calcium chips are placed in water. (a) Based on these observations, what might you expect to see when barium, another Croup 2A element, is placed in water? (b) Give the period in which each element (Mg. Ca, and Ba) is found. What correlation do you think you might find between the reactivity of these elements and their positions in the periodic table?arrow_forward
- There are 2.619 1022 atoms in 1.000 g of sodium. Assume that sodium atoms are spheres of radius 1.86 and that they are lined up side by side. How many miles in length is the line of sodium atoms?arrow_forward2.90 Naturally occurring europium has an average atomic weight of 151.964 amu. If the only isotopes of europium present are 151Eu and 153Eu, describe how you would determine the relative abundance of the two isotopes. Include in your description any information that would need to be looked up.arrow_forwardWhat are the live most abundant elements (by mass) in the earth’s crust, oceans, and atmosphere?arrow_forward
- 2.87 What is the heaviest element to have an atomic weight that is roughly twice its atomic number? What does this suggest must he true about the nuclei of atoms with higher atomic numbers?arrow_forwardWhat evidence led to the conclusion that cathode rays had a negative charge?arrow_forwardThough the common isotope of aluminum has a mass number of 27, isotopes of aluminum have been isolated (or prepared in nuclear reactors) with mass numbers of 24, 25, 26, 28, 29, and 30. How many neutrons are present in each of these isotopes? Why are they all considered aluminum atoms, even though they differ greatly in mass? Write the atomic symbol for each isotope.arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning