Mixtures

Question 1

define an element

Answer 1

a pure substance that contains only one type of atom

Question 2

define a compound

Answer 2

a pure substance made up of 2 or more different elements chemically bonded together (for example CO2)

Question 3

define a mixture

Answer 3

a unpure substance made up of 2 or more substances (elements or compounds) that ARE NOT chemically bonded together and can be separated fairly easily. (for example salt in water)

Question 4

how could you identify a pure substance?

Answer 4

pure substances tend to have sharp meling and boiling points.

Question 5

how could you identify an unpure substance?

Answer 5

unpure substances have a lower melting point