Putting elements together Flashcards
What does air contain?
Oxygen, Nitrogen and Carbon Dioxide gases
What are clouds made from?
Tiny water droplets
What is a compound?
A substance made from different elements that are chemically bonded together
How are compounds different from the elements that they are made from?
The have very different properties
Are Iron and Sulfur elements?
Yes
What happens between Iron and Sulfur when a chemical reaction takes place?
They bond together to make Iron Sulphide
A substance which contains two or more elements joined together is called…?
A compound
Compounds have different __________ from the elements the contain
Properties
Many compounds are formed by __________ reactions between elements
Chemical
How can we make a chemical reaction happen faster?
Add heat
Increase the pressure
What do we call the substances we have at the beginning of a chemical reaction?
Reactants
What do we call the substances that we have at the end of a chemical reaction?
Products
How do we know when a chemical reaction is taking place?
Heat released
Light given off
Gases released
Colour changes
