Many metals, non-metals and semi-metals have variable valency= Eg=
Metals = Iron(2,3) Manganese(2,4) Copper(1,2)
Non-Metal = Sulfur(4,6) Carbon(2,4) Phosphorus(3,5)
Semi-Metal= Silicon(2,4) Arsenic(3,5) Germanium(2,4)
what are the two kinds of variable
It is the kind of variable that you purposely change.
It is a qualitative variable.
It is the kind of variable that you purposely change.
variable
the variable that is most difficult to test
independent
the y variable always changes and x is constant
Yes it can, but it depends on what kind of variable and how it relates to the whole number.
A constant expression.
Neither 100 nor 16.6 is a variable of any kind.
linear