Concept explainers
(a)
Interpretation:
The mass number of an atom having 22 protons, 22 electrons and 26 neutrons should be calculated.
Concept Introduction:
Mass number is the sum of number of protons and neutrons in an atom.
(b)
Interpretation:
The mass number of an atom having 76 protons, 76 electrons and 114 neutrons should be calculated.
Concept Introduction:
Mass number is the sum of number of protons and neutrons in an atom.
(c)
Interpretation:
The mass number of an atom having 34 protons, 34 electrons and 45 neutrons should be calculated.
Concept Introduction:
Mass number is the sum of number of protons and neutrons in an atom.
(d)
Interpretation:
The mass number of an atom having 94 protons, 94 electrons and 150 neutrons should be calculated.
Concept Introduction:
Mass number is the sum of number of protons and neutrons in an atom.
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Chapter 2 Solutions
Introduction to General, Organic and Biochemistry
- 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_forwardOxygen consists of three different _____, each having eight protons but different numbers of neutrons.arrow_forward2-85 The mass of a proton is 1.67 × 10-24g. The mass of a grain of salt is 1.0 × 10-2g. How many protons would it take to have the same mass as a grain of salt?arrow_forward
- 2-73 (Chemical Connections 2D) Copper is a soft metal. how can it be made harder?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_forward2.90 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_forward
- 2-69 (Chemical Connections 2A) Why does the body need sulfur, calcium, and iron?arrow_forward2-103 The element silver has two naturally occurring isotopes: 109Ag and 107Ag with a mass of 106.905 amu. Silver consists of 51.82% 07Ag and has an average atomic mass of 107.868 amu. Calculate the mass of 109Agarrow_forwardThe following table gives the number of protons and neutrons in the nuclei of various atoms. Which atom is the isotope of atom A? Which atom has the same mass number as atom A? Protons Neutrons Atom A 32 39 Atom B 33 38 Atom C 38 50 Atom D 32 38arrow_forward
- Two compounds of iron and chlorine, A and B, contain 1.270 g and 1.904 g of chlorine, respectively, for each gram of iron. Show that these amounts are in the ratio 2 : 3. Is this consistent with the law of multiple proportions? Explain.arrow_forward2.11 Define the term isotope.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
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