compounds

Question 1

How are compounds formed

Answer 1

Compounds are formed when atoms from different elements join together

Question 2

When two or more atoms join it’s called a molecule, what’s the joining of the atoms known as?

Answer 2

It’s known as a chemical bond

Question 3

Give an example of a compound

Answer 3

CO²

Question 4

What do molecules in a compound and elements and a mixture of different elements look like

Answer 4

Elements made up of molecules- atoms are joined and they’re all the same
Molecules in a compound - different atoms joined together
Mixture of different elements - The elements aren’t joined up so it’s a mixture

Question 5

Explain what a chemical reaction involves

Answer 5

chemical reaction involves chemicals(reactants) from combining together or splitting apart to from one or more new substances (products)
- When a new compound a synthesised elements combine
- new compounds produced by chemical reactions are always different from the original elements (reactants)

Question 6

Give the word equation for Iron and sulfur being heated

Answer 6

Iron + sulfur → Iron sulfide
the new substance is no longer magnetic

Question 7

How can you split up a compound back into their original elements

Answer 7

Compounds can be split up if you supply a lot of energy.
This makes the reaction go in reverse