A determinant is not a matrix itself, but a scalar value computed from a square matrix. Statement (1) is incorrect because the determinant is a number, not a matrix. Statement (2) is correct; it is a unique number associated with a square matrix. For a 2x2 matrix $A=\left[\begin{array}{cc}a& b\\ c& d\end{array}\right]$, its determinant is $\det \left(A\right)=ad-bc$.

Final Answer: 2 only