Concept explainers
Introduction:
The number of neutrons present in the given isotopes is to be determined.
Concept introduction:
The number of neutrons in an atom is defined as the difference between the mass number and the number of protons..
The
The mass number
mass number
The accepted way to denote the atomic number and mass number of an atom of an element (X) is as follows:
Here,
Answer to Problem 28QP
Solution: 119, 27, 33, 9, 72, 78, 23, 24, 13, 17, 47, 56
Explanation of Solution
For
From the periodic table, the atomic number of gold is
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From the periodic table, the atomic number of calcium is
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From the periodic table, the atomic number of cobalt is
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From the periodic table, the atomic number of fluorine is
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From the periodic table, the atomic number of iodine is
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From the periodic table, the atomic number of iodine is
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From the periodic table, the atomic number of potassium is
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From the periodic table, the atomic number of potassium is
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From the periodic table, the atomic number of potassium is
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From the periodic table, the atomic number of phosphorus is
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From the periodic table, the atomic number of strontium is
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From the periodic table, the atomic number of potassium is
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Chapter 2 Solutions
Chemistry
- Though 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_forwardDuring nuclear decay a 238U atom can break apart into a helium-4 atom and one other atom. Assuming that no subatomic particles are destroyed during this decay process, what is the other element produced?arrow_forward2.10 Which isotope in each pair contains more neutrons? (A) 35Cl or 33S, (b) 19F or 19Ne, (c) 63Cu or 65Zn, (d) 126I or 127Tearrow_forward
- Give 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_forwardDefine the term atomic weight. Why might the values of atomic weights on a planet elsewhere in the universe be different from those on earth?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
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