Chemical Compounds

Question 1

when are chemical compounds formed?

Answer 1

when the atoms of elements join together

Question 2

give examples of common compounds

Answer 2

-Water H2O (two hydrogen atoms and one oxygen atom creates the compound of water)
-Table Salt. NaCl (one sodium atom and one chlorine atom)

Question 3

what atoms are in CO 2

Answer 3

1 carbon and two oxygen

Question 4

what atoms are in CH 4

Answer 4

1 carbon and 4 hydrogen

Question 5

What is meant by the term molecule?

Answer 5

A molecule is a group of atoms joined together.

Question 6

What do you think is meant by the word/prefix “di” in
chemistry?

Answer 6

Di means two.

Question 7

what is the difference between a compound and a mixture

Answer 7

Compound: Pure substance consisting of two or more different atoms.
Mixture: Two or more different substances not chemically combined

Compounds are formed when atoms JOIN together. It is one thing to mix 2 elements together, but if their atoms do not join chemically then no compound will form.

Question 8

what technique can you use to separate elements

Answer 8

Electrolysis