Question

The valency which determines coordination
number of the element is

Primary valency
Secondary valency
None​

Answer 1

Answer:

The central metal or the metal atoms in coordination compounds show two types of valency. ... The number of secondary valences is fixed for every metal atom. It means that the coordination number is fixed. The metal atom works towards satisfying both its primary and secondary valencies.

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Answer 2

Explanation:

( In modern terminology , the primary valency corresponds to the oxidation number of the metal ion , whereas the secondary valency refers to the coordination number of the metal ion .

2 . A metal ion has a definite number of secondary valencies around the central atom .