Domanda del libro di testo
For chlorine, identify the group number, give the number of electrons in each occupied shell, and write its valence-shell configuration.
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Ch.2 Atoms and the Periodic Table
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 2, Problema 14
How many electrons are present in an atom in which the first and second shells and the 3s subshell are filled? Name the element.
Guida verificata passo dopo passo1
Determine the maximum number of electrons that can be held in the first shell (n=1). The first shell contains only the 1s subshell, which can hold a maximum of 2 electrons.
Determine the maximum number of electrons that can be held in the second shell (n=2). The second shell contains the 2s and 2p subshells. The 2s subshell can hold 2 electrons, and the 2p subshell can hold 6 electrons, for a total of 8 electrons in the second shell.
Determine the number of electrons in the 3s subshell. The 3s subshell can hold a maximum of 2 electrons, as it is a single orbital.
Add the total number of electrons from the first shell, second shell, and 3s subshell: \( 2 + 8 + 2 \). This gives the total number of electrons in the atom.
Identify the element by matching the total number of electrons to its atomic number on the periodic table. The atomic number corresponds to the number of protons (and electrons in a neutral atom).
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Electron Shells
Electron shells are the regions around an atom's nucleus where electrons are likely to be found. The first shell can hold up to 2 electrons, the second shell can hold up to 8 electrons, and subsequent shells can hold more. Understanding how many electrons each shell can accommodate is crucial for determining the total number of electrons in an atom.
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02:29
Electronic Structure: Shells Concept 1
Subshells
Subshells are subdivisions of electron shells that contain orbitals where electrons reside. The 's' subshell can hold a maximum of 2 electrons. In the context of the question, the 3s subshell indicates that the third shell has its 's' orbital filled, contributing to the total electron count in the atom.
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01:06Electronic Structure: Subshells Concept 1
Element Identification
Identifying an element based on its electron configuration involves knowing the total number of electrons, which corresponds to the atomic number of the element. In this case, filling the first and second shells (2 + 8 = 10) and the 3s subshell (2) results in a total of 12 electrons, which corresponds to the element magnesium (Mg) on the periodic table.
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01:14Valence Electrons of Elements (Simplified) Example 1
Pratica correlata
Domanda del libro di testo
Locate aluminum in the periodic table and give its group number and period number.
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Domanda del libro di testo
Use the following blank periodic table to show where the elements matching the following descriptions appear.
a. Elements with the valence-shell electron configuration ns2 np5
b. An element whose third shell contains two p electrons
c. Elements with a completely filled valence shell
2940
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Domanda del libro di testo
An element has completely filled n = 1 and n = 2 shells and has six electrons in the n = 3 shell. Identify the element and its major group (i.e., main group, transition, etc.). Is it a metal or a nonmetal? Identify the orbital in which the last electron is found.
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