Atomic Structure- Elements, Compounds & Mixtures

Question 1

An element is a substance which contains only one ____ of atom.

Answer 1

An element is a substance which contains only one TYPE of atom.

Question 2

A ________ is a substance which contains two or more types of atom ______ together.

Answer 2

A compound is a substance which contains two or more types of atom bonded together.

Question 3

Mixtures contain _________ elements or compounds that can be __________ as they are
not __________ ______ together.

Answer 3

Mixtures contain different elements or compounds that can be separated as they are
not chemically bonded together.

Question 4

In chemical reactions the starting materials are called _________ and new ________ are made.

Answer 4

In chemical reactions the starting materials are called reactants and new products are made.

Question 5

What are the four different states and their symbols?

Answer 5

(s) = solid
(l) = liquid
(g) = gas
(aq) = aqueous (dissolved in solution)

Question 6

You separate an insoluble solid from a solution by _________ it out. The solid can then be
washed and dried to remove any ___________.

Answer 6

You separate an insoluble solid from a solution by filtering it out. The solid can then be
washed and dried to remove any impurities.

Question 7

To separate a ____ from a solution you evaporate the water to produce _________ of salt.

Answer 7

To separate a salt from a solution you evaporate the water to produce crystals of salt.

Question 8

To separate and collect a liquid from a mixture you use _____________. You can use distillation to separate a _______ of liquids.

Answer 8

To separate and collect a liquid from a mixture you use distillation. You can use distillation to separate a mixture of liquids.