atoms elements and compounds

whats a compound

two or more different elements chemically combined in fixed proportions

whats a mixture

different elements or compounds not chemically combined

how do you separate a mixture

A mixture can be separated using physical methods such as filtration, distillation, or chromatography, which exploit differences in physical properties.

whats a molecule

any elements chemically combined even if they are the same element

whats the structure of an atom

An atom consists of a nucleus made up of protons and neutrons, surrounded by electrons that orbit the nucleus in electron shells.

charge of an electron

negative

charge of a proton

positive

charge of an neutron

neutral so no charge

how do you work out the number of electrons and protons

the atomic number as electrons and protons are the same

how do you work out amount of neutrons

subtract the atomic number from the atomic mass

what are isotopes

atoms of the same element with different numbers of neutrons

what are ions

atoms with an overall charge because ions have lost or gained electrons