If I get correct I mark brainlist

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

Which reason best explains why metals are malleable? a)because they have delocalized electrons b)because they have localized electrons c)because they have ionic bonds d)because they have rigid bonds