define the word valency and what is the valency of magnesium and copper
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HELLO DUDE!
WHAT IS VALENCY?
The combining power of an element is known as 'Valency'.
WHAT IS THE VALENCY OF MAGNESIUM AND COPPER?
MAGNESIUM : -2
COPPER : +2
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the combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with.
"carbon always has a valency of 4"
magnesium valency-2
copper valency-1 and 2
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