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Definition: A complex ion is an ion comprising one or more ligands attached to a central metal cation (typically a transition metal) with a dative covalent bond.

• A complex ion has a metal ion at its centre with a number of other molecules or ions (called ligands) surrounding it. These can be considered to be attached to the central ion by coordinate (dative) bonds.
•  The number of lone pairs of electrons which a cation can accept is known as the coordination number of the cation.(wen bin)

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Where after the reaction, a gas is formed

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One element takes place with another element in the compound.
A + BC → AC + B

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it is a type of chemical reaction in which the oxidation state of an atoms are changed

(sofiah)

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Complete combustion: Complete combustion happens when there is a good supply of air.
Fuel + O ₂ → CO ₂ + H ₂ O

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it is when a reactant breaks down when heat is applied to form  2 or more products -Rafyqy
AB --> A + B

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a redox reaction is when there is oxidation and reduction in a reaction

(Jian wen)

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acid-base reaction: HA + BOH → H2O + BA

neutralization reaction: acid + base → salt + water

oxidation-reduction or redox reaction: one atom gains an electron while another atom loses an electron

isomerization: structural arrangement of a molecule changes, although its formula remains the same

hydrolysis: AB + H₂O → AH + BOH

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is a chemical reaction between oxygen and another substance this is accompanied by the generation of light and heat in the form of flame

jingxiang

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Two solutions of soluble salts mix to form an insoluble precipitate and soluble salts

-arianna

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Search the different types of chemical reactions 

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Search the different types of chemical reactions 

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neutralization is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution. (danzel)
Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. (Pearlyn)