Y9 topic 1 Flashcards
Atom
Atoms are the smallest particle of an element, which are far too small to see. Even the most powerful microscopes cannot visualise a single atom
Molecule
A molecule is a group of 2 or more atoms
Compound
A compound is a pure substance that is made from more than one element. In a compound, elements are chemically bonded together, which makes it very difficult to separate them.
Element I
An element is a pure substance that cannot be broken down into any other substances. An element is made from just one type of atom
Electron
It is a subatomic particle
Proton
‘a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron..
Neutrons
‘a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
Solution
A solution is made when a substance dissolves into a liquid. The liquid is called the solvent. The substance that has been dissolved is called the solute.
A solution can also be called a mixture.
Solvent
When it’s mixed with a solute it becomes a mixture
Solute
When it’s mixed with a solvent it becomes a mixture
Miscible
Liquids that can mix together e.g alcohol + water
Imisable
Liquids that can’t mix together e.g oil. + water
Evaporation
When a liquid gains energy and becomes a gas ( can happen at any temperature
Condensation
When a gas looses energy (gets colder) and becomes a liquid
Distillation
A separation method that is the process of evaporation followed by condensation
