Elements and Compounds Flashcards
Elements and compounds
What are substances made up of?
Substances are made up of tiny particles called atoms
What is an element?
Elements are simple substances made up of only one kind of atom.
How is a mixture formed?
A mixture is formed if elements are mixed without joining
How are compounds formed?
Compounds are formed when elements are mixed and they react because that the atoms joins together
True or False
If there is a metal in a compounds the name of the metal goes first
True
How do chemical reactions form?
Chemical reaction always form one ore more new substances
How do chemical reactions start?
It starts when you mix substances together such as heat and other types of energy
what do thermal decomposition reactions involve?
It involves breaking down a single compound using has
what are some typical signs of chemical reactions
a colour change
a gas being given off
a solid forming in a liquid
an energy change
