Elements, compounds and mixtures WHAT IS AN ELEMENT? An element is… • material made of just one type of atom • A substance that can not be separated or broken down into simpler substances by chemical means What are the 3 most abundant elements that make up the earth? answer • ...
Elements and Compounds ? Elements – All particles are alike – The smallest particle of an element that is still recognizable is called an atom – They can’t be broken down anymore without completely destroying it (nuclear explosion) – They are found on the periodic table ? Currently there...
Matter, Elements, Compounds and Mixtures Grand Prismatic Spring in Yellowstone National Park Source: David Maisel/Stone/Getty Images Why does a hot dog get hot in the microwave? Why does wood burn but rocks do not? How does soap work? When Iron rusts, what is happening to it? Why doesn...
A good example of when science teachers use the word particle is when talking about air. Air is a mixture of elements such as oxygen, argon and nitrogen mixed with compounds such as carbon dioxide, or you can say that air is a mixture of particles. Some of the elements in air go aroun...
Elements,compoundsandmixtures WHATISANELEMENT?Anelementis…•materialmadeofjustonetypeofatom •Asubstancethatcannotbeseparatedorbrokendownintosimplersubstancesbychemicalmeans Whatarethe3mostabundantelementsthatmakeuptheearth?•Oxygen•Iron•silicon answer Compositionoftheearth Whatare3mostcommonelementsthat...
Mixtures, Elements, Compounds Scientists like to classify things. One way that scientists classify matter is by its composition. Ultimately, all matter can be classified as mixtures, elements, and compounds. Why isn’t it a good idea to classify matter by its phases? Because one kind of substa...
Mixtures, Elements, and Compounds 混合物,元素,与化合物-文档资料 ElementsandCompounds •Elements –Allparticlesarealike–Thesmallestparticleofanelementthatisstillrecognizableiscalledanatom–Theycan’tbebrokendownanymorewithoutcompletelydestroyingit(nuclearexplosion)–Theyarefoundontheperiodictable•Currentlythereare...
Elements, Compounds, and MixturesKellermanElizabeth R|BardenCindy
elements-compounds-mixtures ClassifyingMatter:Elements,Compounds,andMixtures ByLizLaRosa5thGradeSciencewww.middleschoolscience.com2009 PureSubstances Asampleofmatterthathasdefinitechemicalandphysical properties.Elements puresubstancethatcannotbeseparatedintosimpler substancebyphysicalorchemicalmeans.Compounds Pure...
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) 化合物主要分为有机化合物和无机化合物 有机化合物含有碳氢化合物(或叫做烃 hydrocarbon)，如甲烷(methane CH4) 无机化合物不含碳氢化合物，如硫酸铅(lead (II) sulphate PbSO4) 混合物(mixtures)是由两至多种纯物质（元素或化合物）没有...