Radium-226 has a half life of 1,601 years. What is the mass of Radium-226 in a 100.0 g sample of the isotope at the end of 3,202 years? Show your work and label your final answer at the end. Don't forget your units! *

☆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