what are the valency's?
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a measurement of the power of an atom to combine with others, by the number of hydrogen atoms it can combine with or take the place
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Answer:
Valency is the combining capacity of an atom.
It is the number of electrons lost or gained or shared by an atom.
If the atom donates or gains electrons it forms electro valent bond.
If the atom shares electrons it forms covalent bonds.
If two atoms share electrons but those electrons are provided by one atom then it is called coordinate bond.
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