Model of the atom GapFill

All matter is made up of  cellsenergyionsatomsmoleculescharges, which come in different types, called  moleculesparticlesatomselementsreactantsmetals, represented using symbols which can be found on the  reactivity listInternetatomic modelgroup seriesperiodic tablecompound sequence. When these react together,  beta particlesprotonscompoundsmixturesatomsnoble gases are formed, which have formulae to show the  importancepercentagechargesizeratioposition of each element.  NeutronsMetalsPure substancesMixturesHalogensElectrons contain multiple elements or compounds, and can be  fusedseparatedbondedmeltedshapedreacted using filtration, distillation, crystallisation and chromatography.

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

• the  doughnutstrawberry shortcakeplum puddingcheesecakeupside-down pineappledough ball model, where the atom is a ball of positive charge with electrons dotted around
• Rutherford's model - the  magneticelasticnuclearelectronicdirectionalconnective model - based on the observations of  alpha particleradiationhalogenbeta particlegamma particlemetallic scattering
•  Niels BohrAlbert EinsteinNeil ArmstrongMarie CurieTheodore RooseveltIsaac Newton's model, where electrons orbit the nucleus
•  Alexander FlemingFrancis DrakeCharles DarwinJames ChadwickJames DaltonDmitri Mendeleev's model, where neutrons are also in the nucleus

Different  alphaomegaultrasonicmagneticinfraredsubatomic particles have different masses and charges. Protons (positive particles) and neutrons (neutral particles) have a mass of  -110.510212, 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  bondscompoundsprotonsisotopessaltsions.