Domanda del libro di testo
Which will experience the greater effect nuclear charge,
the electrons in the n = 2 shell in F or the n = 2 shell in B?
Which will be closer to the nucleus?
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Ch.7 - Periodic Properties of the Elements
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 7, Problema 16a
Detailed calculations show that the value of Zeff for the outermost electrons in Si and Cl atoms is 4.29+ and 6.12+, respectively. (a) What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant?
Guida verificata passo dopo passo1
insert step 1: Identify the atomic numbers of silicon (Si) and chlorine (Cl). Silicon has an atomic number of 14, and chlorine has an atomic number of 17.
insert step 2: Determine the number of core and valence electrons for each element. For Si, there are 10 core electrons and 4 valence electrons. For Cl, there are 10 core electrons and 7 valence electrons.
insert step 3: Calculate the screening constant (S) for each element. Since core electrons contribute 1.00 and valence electrons contribute 0.00, the screening constant for Si is 10, and for Cl, it is also 10.
insert step 4: Use the formula for effective nuclear charge (Z_{eff}): Z_{eff} = Z - S, where Z is the atomic number and S is the screening constant.
insert step 5: Substitute the values into the formula for each element. For Si, Z_{eff} = 14 - 10. For Cl, Z_{eff} = 17 - 10.
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Concetti chiave
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Effective Nuclear Charge (Zeff)
Effective Nuclear Charge (Zeff) is the net positive charge experienced by an electron in a multi-electron atom. It accounts for the actual nuclear charge (the number of protons) and the shielding effect caused by other electrons. The greater the Zeff, the stronger the attraction between the nucleus and the outermost electrons, influencing their energy levels and chemical behavior.
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Percorso guidato
01:51
Effective Nuclear Charge
Shielding Effect
The shielding effect refers to the phenomenon where inner electrons partially block the attractive force of the nucleus on outer electrons. This results in a lower effective nuclear charge felt by the outer electrons. In calculations, core electrons typically contribute a fixed value to the screening constant, while valence electrons contribute less, reflecting their proximity to the nucleus.
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02:31Photoelectric Effect
Valence and Core Electrons
Electrons in an atom are categorized as valence or core electrons. Valence electrons are those in the outermost shell and are involved in chemical bonding, while core electrons are located in inner shells and do not participate in bonding. Understanding the distinction between these two types of electrons is crucial for calculating Zeff, as they contribute differently to the shielding effect.
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Percorso guidato
02:32Main Group Elements Valence Electrons
Pratica correlata
Domanda del libro di testo
Arrange the following atoms in order of increasing effective
nuclear charge experienced by the electrons in the n = 2
shell: Be, Br, Na, P, Se.
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Domanda del libro di testo
Detailed calculations show that the value of Zeff for the outermost electrons in Na and K atoms is 2.51+ and 3.49+, respectively. (e) Predict Zeff for the outermost electrons in the Rb atom based on the calculations for Na and K.
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Domanda del libro di testo
Detailed calculations show that the value of Zeff for the outermost electrons in Na and K atoms is 2.51+ and 3.49+, respectively. (b) What values do you estimate for Zeff using Slater’s rules?
Domanda del libro di testo
Which quantity must be determined experimentally in
order to determine the bonding atomic radius of an atom?
(a) The distance from the nucleus where the probability of finding an electron goes to zero.
(b) The distance between the nuclei of two atoms that are bonded together.
(c) The effective nuclear charge of an atom.
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