Domanda del libro di testo
(c) An atom has the electron configuration 1s22s22p63s23p2. How many valence electrons does the atom have?
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Ch.8 - Basic Concepts of Chemical Bonding
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 8, Problema 9a
(a) True or false: An element's number of valence electrons is the same as its atomic number.
Guida verificata passo dopo passo1
Step 1: Understand the definition of atomic number. The atomic number of an element is the number of protons in the nucleus of an atom of that element.
Step 2: Understand the concept of valence electrons. Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.
Step 3: Recognize that for main group elements, the number of valence electrons is often related to the group number in the periodic table, not the atomic number.
Step 4: Consider examples to illustrate the difference. For instance, carbon has an atomic number of 6, but it has 4 valence electrons.
Step 5: Conclude that the statement is false because the number of valence electrons is not the same as the atomic number.
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Valence Electrons
Valence electrons are the electrons located in the outermost shell of an atom. They play a crucial role in chemical bonding and reactions, as they are the electrons that can be gained, lost, or shared when atoms interact. The number of valence electrons varies among elements and is determined by the group number in the periodic table.
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02:12
Transition Metals Valence Electrons
Atomic Number
The atomic number of an element is the number of protons found in the nucleus of its atoms. It uniquely identifies an element and determines its position in the periodic table. While the atomic number also indicates the number of electrons in a neutral atom, it does not directly correspond to the number of valence electrons, which can differ based on the element's group.
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02:10Atom Structure
Periodic Table Groups
Elements in the periodic table are organized into groups based on similar chemical properties and the number of valence electrons. For example, elements in Group 1 have one valence electron, while those in Group 2 have two. Understanding these groupings helps predict how elements will react chemically, but it is important to note that the atomic number does not equal the number of valence electrons for most elements.
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05:33Periodic Table: Group Names
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Domanda del libro di testo
The partial Lewis structure that follows is for a hydrocarbon molecule. In the full Lewis structure, each carbon atom satisfies the octet rule, and there are no unshared electron pairs in the molecule. The carbon—carbon bonds are labeled 1, 2, and 3. (c) Which carbon—carbon bond is the strongest one?
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Domanda del libro di testo
The partial Lewis structure that follows is for a hydrocarbon molecule. In the full Lewis structure, each carbon atom satisfies the octet rule, and there are no unshared electron pairs in the molecule. The carbon—carbon bonds are labeled 1, 2, and 3. (a) How many hydrogen atoms are in the molecule?
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Domanda del libro di testo
(a) True or false: The hydrogen atom is most stable when it has a full octet of electrons.
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Domanda del libro di testo
(b) How many valence electrons does a nitrogen atom possess?
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Domanda del libro di testo
Consider the Lewis structure for the polyatomic oxyanion shown here, where X is an element from the third period (Na - Ar). By changing the overall charge, n, from 1- to 2- to 3- we get three different polyatomic ions. For each of these ions (b) determine the formal charge of the central atom, X;
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