1. compound words: nuclear fission, heart attack, credit card lexical chunk: on the hour, in due course

Answers

1.compound words: nuclear fission, heart attack, credit card

2.lexical chunk: on the hour, in due course

3.Idiom: carry the can, Pick someone's brains, get wimd of something, out and about

4.Multi-word verbs: come down with, go out with, keep up with