“valency”的概念、定义、翻译、参考文献-科学参考

valency

Physics

The combining power of an atom or radical, equal to the number of hydrogen atoms that the atom could combine with or displace in a chemical compound (hydrogen has a valency of 1). It is equal to the ionic charge in ionic compounds; for example, in Na₂S, sodium has a valency of 1 (Na⁺) and sulphur a valency of 2 (S²⁻). In covalent compounds it is equal to the number of bonds formed; in CO₂ both carbon and oxygen have a valency of 2.

Mathematics

A synonym for degree (of a vertex of a graph).

Chemistry

The combining power of an atom or radical, equal to the number of hydrogen atoms that the atom could combine with or displace in a chemical compound (hydrogen has a valency of 1). It is equal to the ionic charge in ionic compounds; for example, in Na₂S, sodium has a valency of 1 (Na⁺) and sulphur a valency of 2 (S²⁻). In covalent compounds it is equal to the number of bonds formed; in CO₂ oxygen has a valency of 2 and carbon has a valency of 4.

Chemical Engineering

The property of atoms or radicals equal to the number of atoms of hydrogen that an atom or group can combine with or displace in forming compounds. Hydrogen therefore has a valency of 1. In ionic compounds, it is equal to the ionic charge. For example, in MgCl₂, magnesium has a valency of 1 while chlorine has a valency of 2. In covalent compounds, it is equal to the number of bonds formed. For example, in SO₂, sulphur has a valency of 4 and oxygen has a valency of 2.

Electronics and Electrical Engineering

The number of hydrogen (or equivalent) atoms with which an atom will combine or that it will displace.

Geology and Earth Sciences

The bonding potential of an atom, measured by the number of hydrogen ions (valency 1) that the atom could combine with or replace. In an ionic compound the valency (electrovalency) equals the ionic charge on each ion, e.g. in the compound MgO, Mg²⁺ shows a valency of +2, O²⁻ a valency of −2. In a covalent compound the valency (covalency) of an atom is equal to the number of bonds it forms, e.g. in CH₄ carbon has a valency of 4, hydrogen a valency of 1.

单词	valency
释义	valency Physics The combining power of an atom or radical, equal to the number of hydrogen atoms that the atom could combine with or displace in a chemical compound (hydrogen has a valency of 1). It is equal to the ionic charge in ionic compounds; for example, in Na₂S, sodium has a valency of 1 (Na⁺) and sulphur a valency of 2 (S²⁻). In covalent compounds it is equal to the number of bonds formed; in CO₂ both carbon and oxygen have a valency of 2. Mathematics A synonym for degree (of a vertex of a graph). Chemistry The combining power of an atom or radical, equal to the number of hydrogen atoms that the atom could combine with or displace in a chemical compound (hydrogen has a valency of 1). It is equal to the ionic charge in ionic compounds; for example, in Na₂S, sodium has a valency of 1 (Na⁺) and sulphur a valency of 2 (S²⁻). In covalent compounds it is equal to the number of bonds formed; in CO₂ oxygen has a valency of 2 and carbon has a valency of 4. Chemical Engineering The property of atoms or radicals equal to the number of atoms of hydrogen that an atom or group can combine with or displace in forming compounds. Hydrogen therefore has a valency of 1. In ionic compounds, it is equal to the ionic charge. For example, in MgCl₂, magnesium has a valency of 1 while chlorine has a valency of 2. In covalent compounds, it is equal to the number of bonds formed. For example, in SO₂, sulphur has a valency of 4 and oxygen has a valency of 2. Electronics and Electrical Engineering The number of hydrogen (or equivalent) atoms with which an atom will combine or that it will displace. Geology and Earth Sciences The bonding potential of an atom, measured by the number of hydrogen ions (valency 1) that the atom could combine with or replace. In an ionic compound the valency (electrovalency) equals the ionic charge on each ion, e.g. in the compound MgO, Mg²⁺ shows a valency of +2, O²⁻ a valency of −2. In a covalent compound the valency (covalency) of an atom is equal to the number of bonds it forms, e.g. in CH₄ carbon has a valency of 4, hydrogen a valency of 1.
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