Atomic structure and the periodic table Flashcards
(7 cards)
1
Q
Definition of an element.
A
In an element, all of the atoms are the same
2
Q
Definition of an compound.
A
Compounds contain 2 or more different elements chemically combined in fixed proportions.
3
Q
Definition of a mixture
A
A mixtures contains different elements or compounds that are not chemically combined
4
Q
Examples of physical separation techniques
A
Filtration, distillation, crystallisation, chromatography
5
Q
Definition of a molecule.
A
Any elements chemically combined
6
Q
Physical separation techniques can only be used to separate ______.
A
Mixtures
7
Q
What is filtration?
A
Used to separate an insoluble solid from a liquid
