Question

What are diagonal elements​

Answer 1

The elements of the second period which are diagonal to the elements of the third period are called diagonal elements.

For example Li,Be,B,C are diagonal to Mg,Al,Si respectively.

Answer 2

Answer:

diagonal element (plural diagonal elements) (linear algebra) An element on the main diagonal of a square matrix, that is, an element in row k and column k where k is an integer between 1 and the number of rows (or columns) in the matrix.