Elements, compounds and equations Flashcards
1
Q
What is a compound?
A
Different elements that are combined together.
2
Q
How do you write the formula of a compound?
A
Combine the chemical symbols of the elements that combine to make them.
3
Q
What is an atom?
A
The smallest piece of an element that can exist.
4
Q
How many different types of elements are there?
A
118
5
Q
What are the key features of a chemical reaction?
A
- > Compounds are broken up or formed
- > At least 1 new substance is created
- > Measurable energy change
- > No atoms are created or destroyed
6
Q
What is a chemical equation?
A
A chemical equation shows what happens in a chemical reaction using symbols or words
7
Q
What does an equation look like?
A
reactants -> products
8
Q
What must symbol equations be?
A
Balanced
