How do you fill in the chart and all of 5?

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

Compound with sulfer  is bright red 

☆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