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Ch.2 - Atoms, Molecules, and Ions
Brown - Chemistry: The Central Science 14th Edition
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Tutti i libri di testoBrown 14th EditionCh.2 - Atoms, Molecules, and IonsProblema 23d
Capitolo 2, Problema 23d

Consider an atom of 10B. (d) Are either of the atoms obtained in parts (b) and (c) isotopes of 10B? If so which one?

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Step 1: Recall the definition of isotopes. Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.
Step 2: Identify the number of protons in 10B. Boron (B) has an atomic number of 5, which means it has 5 protons.
Step 3: Determine the number of neutrons in 10B. The mass number is 10, so the number of neutrons is 10 - 5 = 5 neutrons.
Step 4: Review the atoms obtained in parts (b) and (c) of the problem. Compare their number of protons and neutrons to those of 10B.
Step 5: Conclude whether either of the atoms from parts (b) and (c) have the same number of protons (5) and a different number of neutrons compared to 10B, which would make them isotopes.

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Isotopes

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons. This results in different atomic masses for the isotopes. For example, boron has isotopes such as 10B and 11B, where 10B has 5 neutrons and 11B has 6 neutrons. Understanding isotopes is crucial for identifying whether two atoms belong to the same element but differ in mass.
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Isotopes

Atomic Number and Mass Number

The atomic number of an element is the number of protons in its nucleus, which defines the element itself. The mass number is the total number of protons and neutrons in the nucleus. For boron, the atomic number is 5, and for the isotope 10B, the mass number is 10. This distinction helps in determining whether two atoms are isotopes based on their mass numbers.
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Atomic Mass

Nuclear Stability

Nuclear stability refers to the stability of an atomic nucleus, which is influenced by the ratio of protons to neutrons. Isotopes can be stable or unstable; stable isotopes do not undergo radioactive decay, while unstable ones do. Understanding nuclear stability is important when discussing isotopes, as it can affect their occurrence and applications in fields like medicine and energy.
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Band of Stability: Nuclear Fission
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