Sometimes rock formations form because pieces of the rock has been crumbled and been blown/washed away. this is and example of what?

Mechancial weathering i think

Hi. I think it's erosion.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts