Rusting of iron is one form of oxidation. whether a substance oxidizes or corrodes describes a property of matter.
a) chemical
b) colligative
c) intensive
d) physical

Rusting of iron is one form of oxidation. Whether a substance oxidizes or corrodes describes a chemical property of matter. 

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☆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