2.) How many moles of chromium (II) sulfide, Cr, S3, will be produced when 21.15 moles of chromium, Cr, reacts with sulfur, Sg, in excess?

☆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