It is different in the same way as any property is different from any other property. Each property must be unique because otherwise it would simply be another property.
No because the associative property can be found in other operations as well.
Yes, but only if it is the associative property of addition - not other versions of it.
the other meaning is Apa
distributive
In general, the associative property states that "a · (b · c) = (a · b) · c" for some operation "·". In other words, if an operation is associative, the order in which multiple calculations involving it are performed is irrelevant.
It is the property that, in symbols, says: (a + b) + c = a + (b + c). In other words, you can either add the left part or the right part first, and still get the same result.
The associative property says that you can group addends and multiplicands together however you want. The individual numbers in the expression aren't bothered by any of the other numbers getting together for drinks.
The associative property definition is this : you can group two numbers multiply them together then multiply that product by the other number. For example (3x3)x3=27 so basically all the associative property is about is grouping the numbers in different ways and making the problem faster and easier depending on what numbers you are multiplying. Hope that makes it easier 
It works for some operators in arithmetic as it does in geometry, and not with other operators.
Here is how the associative property works (in the case of addition):(a + b) + c = a + (b + c) So, you have the parentheses on one side on the left, and on the other side on the right of the equal sign.
Each and every one - even though there may be times when it is not explicit.
In mathematics, the associative property for a set S and a binary operation ~ implies that for all element a, b and c of S,(a ~ b) ~ c = a ~ (b ~ c) and so either can be written as a ~ b ~ cIn other words, the order in which the binary operations are carried out does not affect the result.Addition and multiplication of numbers are associative, subtraction and division are not.