Arrange the tiles in the table based on the number and shape of each tile. two tiles have been positioned for you. continue the sequence to arrange the rest of the tiles in an orderly way.

I'm doing this for my school too, and I would show you a picture of mine so that you can easily copy it, but it won't let me access it.

It's kinda hard to explain.

Put the triangle with a 7 underneath the one with a 2 on it.

Put the square with an 8 underneath the one with a 3, and the one with a 12 under the 8.

Now put the diamond with a 9 under the 4, the 13 under the 9, and the 16 under the 13.

Hopefully you'll see the pattern at that point.

a electronegativity decreases beacuse the size of nucleus is bigger.