“element”的概念、定义、翻译、参考文献-科学参考

element

Physics

A substance that cannot be decomposed into simpler substances. In an element, all the atoms have the same number of protons or electrons, although the number of neutrons may vary. There are 92 naturally occurring elements. See Chemical elements, The. See also periodic law; transuranic elements; transactinide elements.

Mathematics

An object in a set is an element of that set.

Statistics

See matrix.

Chemistry

A substance that cannot be decomposed into simpler substances. In an element, all the atoms have the same number of protons or electrons, although the number of neutrons may vary. There are 92 naturally occurring elements. For a complete list of the elements, see Appendix 6. See also periodic table; transuranic elements; transactinide elements.

Chemical Engineering

1. A substance that is not able to be decomposed into simpler substances by any known chemical process. All the atoms in an element have the same number of protons or electrons but the number of neutrons may vary. All the elements are listed in the periodic table of which 93 are naturally occurring.

2. A small part of a system used as the basis for an analysis of an entire system. For example, an element may be a portion of the fluid in a (p. 124) pipe or vessel upon which a force or energy balance is performed to determine the fluid behaviour within the entire pipe or vessel.

3. A component of a control device or system.

Computer

1. (of a set) Another name for member.
2. See logic element.

Internet

The basic building block of a document written using the Hypertext Markup Language. An example of such an element is an anchor.

Electronics and Electrical Engineering

A substance that consists entirely of atoms of the same atomic number. Over 100 different elements have been identified (see periodic table). Elements are the basic substances from which compounds are built up by chemical combination: this excludes disruptive processes in which the atomic nuclei comprising the element are disturbed.

单词	element
释义	element Physics A substance that cannot be decomposed into simpler substances. In an element, all the atoms have the same number of protons or electrons, although the number of neutrons may vary. There are 92 naturally occurring elements. See Chemical elements, The. See also periodic law; transuranic elements; transactinide elements. Mathematics An object in a set is an element of that set. Statistics See matrix. Chemistry A substance that cannot be decomposed into simpler substances. In an element, all the atoms have the same number of protons or electrons, although the number of neutrons may vary. There are 92 naturally occurring elements. For a complete list of the elements, see Appendix 6. See also periodic table; transuranic elements; transactinide elements. Chemical Engineering 1. A substance that is not able to be decomposed into simpler substances by any known chemical process. All the atoms in an element have the same number of protons or electrons but the number of neutrons may vary. All the elements are listed in the periodic table of which 93 are naturally occurring. 2. A small part of a system used as the basis for an analysis of an entire system. For example, an element may be a portion of the fluid in a (p. 124) pipe or vessel upon which a force or energy balance is performed to determine the fluid behaviour within the entire pipe or vessel. 3. A component of a control device or system. Computer 1. (of a set) Another name for member. 2. See logic element. Internet The basic building block of a document written using the Hypertext Markup Language. An example of such an element is an anchor. Electronics and Electrical Engineering A substance that consists entirely of atoms of the same atomic number. Over 100 different elements have been identified (see periodic table). Elements are the basic substances from which compounds are built up by chemical combination: this excludes disruptive processes in which the atomic nuclei comprising the element are disturbed.
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