4.1.1.1 Atoms, Elements and Compounds/ 4.1.1.2 Mixtures Flashcards
1
Q
What is an atom?
A
An atom is the smallest part of an element that can exist
2
Q
What is an element?
A
An element is a substance where all the atoms are the same
3
Q
What is a compound?
A
A compound is a substance that contains two or more different elements chemically combined in a fixed proportion
4
Q
True or False?
Compounds usually have totally different properties to the elements that they are made from.
A
True
5
Q
How do we separate a compound back into its elements?
A
You use a chemical reaction
6
Q
What is a mixture?
A
In a mixture, different elements or compounds are not chemically combined together
7
Q
How do we separate a mixture?
A
You use a physical techniques
8
Q
What is a molecule?
A
A molecule has any elements chemically joined
