GCSE - Basic Concepts, Separating and Purifying, Acids Flashcards
1
Q
What is an element?
A
A substance that cannot be separated into anything simpler. It contains only one type of atom.
2
Q
What is a compound?
A
A substance that contains two or more elements chemically combined. The amounts of each element are in fixed proportions.
3
Q
What is a mixture?
A
A substance that contains two or more elements physically combined. The amounts of each element can be in any proportion.
4
Q
What is a positive ion called?
A
A cation.
5
Q
What is a negative ion called?
A
An anion.
6
Q
How to calculate the relative atomic mass?
A
100
7
Q
What is an isotope?
A
Different atoms of the same element with the same number of protons, but different number of neutrons.
8
Q
What is simple distillation?
A
One liquid
