Atomic structure and the periodic table Flashcards
What does the nucleus consist of
Protons and neutrons
What charge does the nucleus have
Positive
What are the charges for proton neutrons and electrons
Protons – +1, neutron – zero, electron – -1
What is the relative mass of a proton neutron and electron
Protons – one, neutron – one, electron – very small
What charge are atoms
Overall atoms are neutral
What is an element
An element is a substance made up of atoms that all have the same number of protons in the nucleus
Define isotopes
Isotopes of different forms of the same element which have the same number of protons but different number of neutrons
What’s the formula for relative atomic mass
Some of (isotope abundant times isotope mass number)/sum of abundance of all the isotopes
What is a compound
Compounds contain two or more different elements chemically combined in a fixed proportion
How do you separate a compound 
Do a chemical reaction
What is a mixture
Different elements and compounds not chemically bonded
What are four samples how do you separate a mixture
Filtration, crystallisation, distillation, chromatography
What is simple distillation used for
Used to separate liquids from a solid to keep the liquid
What do you do in simple distillation
First evaporate the liquid by heating then condense the vapour by Cooling
What is fractional distillation
Separating a mixture of different liquids with different boiling points
