Concept explainers
(a)
Interpretation:
The number of neutrons in a carbon
Concept Introduction:
Mass number is the sum of number of protons and neutrons in an atom.
(b)
Interpretation:
The number of neutrons in a germanium atom of mass number 73 should be calculated.
Concept Introduction:
Mass number is the sum of number of protons and neutrons in an atom.
Atomic number is the number of protons present in the nucleus of an atom.
(c)
Interpretation:
The number of neutrons in an osmium atom of mass number 188 should be calculated.
Concept Introduction:
Mass number is the sum of number of protons and neutrons in an atom.
Atomic number is the number of protons present in the nucleus of an atom.
(d)
Interpretation:
The number of neutrons in a platinum atom of mass number 195 should be identified.
Concept Introduction:
Mass number is the sum of number of protons and neutrons in an atom.
Atomic number is the number of protons present in the nucleus of an atom.
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Introduction to General, Organic and Biochemistry
- 2-27 If each atom in Problem 2-26 acquired two more neutrons, what element would each then be?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_forwardIn what way are isotopes of a given element always different? In what way(s) are they always the same?arrow_forward
- 2-103 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_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_forward2-101 Complete the following table: Symbol Atomic number Atomic weight Mass number # of protons # of neutrons # of electrons H 0 Li 4 3 Al 26 58 78 17 20arrow_forward
- 2-102 An element consists of 90.51% of an isotope with a mass of 19.992 amu, 0.27% of an isotope with a mass of 20.994 amu, and 9.22% of an isotope with a mass of 21.990 amu. Calculate the average atomic mass and identify the element.arrow_forwardWhy do we not necessarily expect the number of neutrons in the nucleus of an atom to be the same as the number of protons?arrow_forward
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