Model of the atom GapFill

All matter is made up of  ionsatomsmoleculeschargesenergycells, which come in different types, called  elementsmetalsparticlesreactantsatomsmolecules, represented using symbols which can be found on the  reactivity listInternetperiodic tablegroup seriesatomic modelcompound sequence. When these react together,  mixturesatomsbeta particlesnoble gasesprotonscompounds are formed, which have formulae to show the  importancepercentageratiopositionsizecharge of each element.  MixturesNeutronsHalogensPure substancesMetalsElectrons contain multiple elements or compounds, and can be  reactedbondedshapedmeltedfusedseparated using filtration, distillation, crystallisation and chromatography.

Over time, different scientists have developed new models of the atom. These include:

• the  dough ballstrawberry shortcakecheesecakedoughnutupside-down pineappleplum pudding model, where the atom is a ball of positive charge with electrons dotted around
• Rutherford's model - the  magneticnuclearelasticconnectivedirectionalelectronic model - based on the observations of  metallicbeta particlegamma particlehalogenradiationalpha particle scattering
•  Albert EinsteinMarie CurieNiels BohrNeil ArmstrongTheodore RooseveltIsaac Newton's model, where electrons orbit the nucleus
•  Francis DrakeJames ChadwickAlexander FlemingJames DaltonDmitri MendeleevCharles Darwin's model, where neutrons are also in the nucleus

Different  omegasubatomicinfraredmagneticalphaultrasonic particles have different masses and charges. Protons (positive particles) and neutrons (neutral particles) have a mass of  0.5112210-1, and electrons (negative particles) have a very small mass. The relative atomic mass of an atom is the weighted average mass of all of the element's  ionsisotopesbondssaltscompoundsprotons.