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
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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
ALEKS 360 CHEM ACCESS CARD
- 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_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_forward1. The mass of an atom of manganese is 54.9380 u. How many neutrons are contained in one atom of this element? 25 29 30 55arrow_forward
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- 2-31 Tin-118 is one of the isotopes of tin. Name the isotopes of tin that contain two, three, and six more neutrons than tin-118.arrow_forwardThe element gallium, used in gallium arsenide semiconductors, has an atomic weight of 69.72 amu. There are only two isotopes of gallium, Ga with a mass of 6.9257 amu and Ga with a mass of 70.9249 amu. What are the isotopic abundances of gallium? Gallium melts just above room temperaturearrow_forward2.13 How many electrons, protons, and neutrons are there in each of the following atoms? (a) 24Mg, (b) 119Sn, (c) 232Th, (d) 13C, (e) 63Cu, (f) 205Biarrow_forward
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