C1 Flashcards
Who developed the model of the atom?
James Chadwick
What is an atom?
The smallest part of an element that can exist
What is a feature of an element?
Contains only one type of atom
What is a feature of a compound?
Is two or more elements chemically combined
How can you separate compounds?
ONLY by chemical reactions
Max number of electrons in each shell?
2,8,8,2
What is the atomic number?
Number of protons in an atom
What is the mass number?
Sum of protons and neutrons in the nucleus
What is a mixture
Two or more elements or compounds NOT chemically combined together
What is filtration?
Separating an insoluble liquid from a liquid
What is crystallisation?
Separate a solid from a solution
What is fractional distillation?
Separating a mixture of liquids each with different boiling points
What is chromatography?
Separating substances that move at different rates through a medium
What are isotopes?
Atoms with the same element, number of protons with a different number of neutrons
