Definition of cation in English:

cation

noun ˈkatʌɪənˈkædaɪən

Chemistry

A positively charged ion, i.e. one that would be attracted to the cathode in electrolysis.
The opposite of anion
Example sentencesExamples
- Non-metals accept electrons in forming anions while metals donate electrons to form cations.
- When two atoms swap electrons to produce a cation and an anion, the two ions are attracted to each other.
- It is called a cation if a positive charge exists and an anion if a negative charge exists.
- The functional groups of iron hydroxides may sequestrate some cations and anions.
- The key step in a unimolecular reaction is the formation of the carbon cation, or carbonium ion, by the departure of the leaving group.

Derivatives

cationic

adjective katʌɪˈɒnɪk

Chemistry

The development of both cationic and anionic exchange materials did not occur until 1935.
Example sentencesExamples
- The primary conditioning ingredients are cationic surfactants, silicones, and polymers.
- More than a decade of research into nonviral gene delivery has yielded a number of synthetic cationic lipids and polymers with transfection activity.
- Synthetic small interfering RNA molecules can be introduced into cells by using reagents such as cationic lipids to promote uptake across the cell membrane.
- Adsorption of cationic polymers on target cell surfaces is rapid, dose dependent, and independent of cell type

Origin

Mid 19th century: from cata- 'alongside' or from cathode, + ion.

Rhymes

flatiron

Definition of cation in US English:

cation

nounˈkædaɪənˈkadīən

Chemistry

A positively charged ion, i.e. one that would be attracted to the cathode in electrolysis.
The opposite of anion
Example sentencesExamples
- It is called a cation if a positive charge exists and an anion if a negative charge exists.
- When two atoms swap electrons to produce a cation and an anion, the two ions are attracted to each other.
- The key step in a unimolecular reaction is the formation of the carbon cation, or carbonium ion, by the departure of the leaving group.
- Non-metals accept electrons in forming anions while metals donate electrons to form cations.
- The functional groups of iron hydroxides may sequestrate some cations and anions.

Origin

Mid 19th century: from cata- ‘alongside’ or from cathode, + ion.

单词	cation
释义	Definition of cation in English: cation noun ˈkatʌɪənˈkædaɪən Chemistry A positively charged ion, i.e. one that would be attracted to the cathode in electrolysis. The opposite of anion Example sentencesExamples Non-metals accept electrons in forming anions while metals donate electrons to form cations. When two atoms swap electrons to produce a cation and an anion, the two ions are attracted to each other. It is called a cation if a positive charge exists and an anion if a negative charge exists. The functional groups of iron hydroxides may sequestrate some cations and anions. The key step in a unimolecular reaction is the formation of the carbon cation, or carbonium ion, by the departure of the leaving group. Derivatives cationic adjective katʌɪˈɒnɪk Chemistry The development of both cationic and anionic exchange materials did not occur until 1935. Example sentencesExamples The primary conditioning ingredients are cationic surfactants, silicones, and polymers. More than a decade of research into nonviral gene delivery has yielded a number of synthetic cationic lipids and polymers with transfection activity. Synthetic small interfering RNA molecules can be introduced into cells by using reagents such as cationic lipids to promote uptake across the cell membrane. Adsorption of cationic polymers on target cell surfaces is rapid, dose dependent, and independent of cell type Origin Mid 19th century: from cata- 'alongside' or from cathode, + ion. Rhymes flatiron Definition of cation in US English: cation nounˈkædaɪənˈkadīən Chemistry A positively charged ion, i.e. one that would be attracted to the cathode in electrolysis. The opposite of anion Example sentencesExamples It is called a cation if a positive charge exists and an anion if a negative charge exists. When two atoms swap electrons to produce a cation and an anion, the two ions are attracted to each other. The key step in a unimolecular reaction is the formation of the carbon cation, or carbonium ion, by the departure of the leaving group. Non-metals accept electrons in forming anions while metals donate electrons to form cations. The functional groups of iron hydroxides may sequestrate some cations and anions. Origin Mid 19th century: from cata- ‘alongside’ or from cathode, + ion.
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