ECM: atoms & molecules

Question 1

define an atom

Answer 1

the smallest possible particle a substance can exist in

Question 2

define a molecule

Answer 2

two or more atoms chemically combined together

Question 3

do molecules need to be made up of the same type of atoms?

Answer 3

no

Question 4

define diatomic, triatomic and polyatomic molecules

Answer 4

diatomic molecule: consists of two atoms chemically combined together
triatomic molecule: consists of three atoms chemically combined together
polyatomic molecule: consists of three or more atoms chemically combined together