Question

Determine whether each statement is true or false. If false, correct it. (a) The $\mathrm{Fe}^{2+}$ ion contains 29 protons and 26 electrons. (b) The $\mathrm{Cs}^{+}$ ion contains 55 protons and 56 electrons. (c) The $S e^{2-}$ ion contains 32 protons and 34 electrons. (d) The $L i^{+}$ ion contains 3 protons and 2 electrons.

Name: Problem 80, Chapter 4: Introductory Chemistry
Uploaded: 2020-08-30T19:39:25-08:00
Duration: 1 min 15 s
Channel: David Collins
Description: Determine whether each statement is true or false. If false, correct it. (a) The Fe^2+ ion contains 29 protons and 26 electrons. (b) The Cs^+ ion contains 55 protons and 56 electrons. (c) The S e^2- ion contains 32 protons and 34 electrons. (d) The L i^+ ion contains 3 protons and 2 electrons.

   Determine whether each statement is true or false. If false, correct it.
(a) The $\mathrm{Fe}^{2+}$ ion contains 29 protons and 26 electrons.
(b) The $\mathrm{Cs}^{+}$ ion contains 55 protons and 56 electrons.
(c) The $S e^{2-}$ ion contains 32 protons and 34 electrons.
(d) The $L i^{+}$ ion contains 3 protons and 2 electrons.

Introductory Chemistry

Nivaldo J. Tro 5th Edition

Chapter 4, Problem 80

Instant Answer

Solved by Expert David Collins

08/30/2020

Step 1

For iron (Fe), the atomic number is 26, so it always has 26 protons. The charge of an ion tells us how many electrons it has compared to the number of protons. A positive charge means it has fewer electrons, and a negative charge means it has more electrons. Show more…

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Determine whether each statement is true or false. If false, correct it. (a) The $\mathrm{Fe}^{2+}$ ion contains 29 protons and 26 electrons. (b) The $\mathrm{Cs}^{+}$ ion contains 55 protons and 56 electrons. (c) The $S e^{2-}$ ion contains 32 protons and 34 electrons. (d) The $L i^{+}$ ion contains 3 protons and 2 electrons.

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Key Concepts

Atomic Number

The atomic number represents the number of protons in the nucleus of an atom and uniquely identifies the element. This concept is central to understanding atomic structure and the periodic table, as it determines the element's identity and its position in the periodic arrangement.

Ion Charge

The ion charge indicates the net electrical charge of an atom or molecule, resulting from the imbalance between the number of protons and electrons. A positive ion (cation) has lost electrons, while a negative ion (anion) has gained electrons. Recognizing ion charge is essential for predicting chemical behavior and reactivity.

Electron Count in Ions

To determine the number of electrons in an ion, one must adjust the electron count of a neutral atom by its charge: subtract electrons for cations and add electrons for anions. This concept is crucial in understanding the electron configuration, chemical bonding, and overall stability of ions.

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