are both elements and compounds pure substances?
530924
Elements and compounds are both examples of pure substances. A substance that cannot be broken down into chemically simpler components is an element.
744886
No. Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances.
1057385
Compounds: • A pure substance containing two or more kinds of_atoms • The atoms are chemically combined in some way. Often times (but not always) they come together to form groups of atoms called molecules. ... Mixtures can be separated into their components by chemical or physical means.
1156755
A compound is a pure substance that is composed of elements chemically bonded in definite proportions. A compound can be broken down into simpler substances only by chemical reactions, such as electrolysis. A solution is a homogeneous mixture, meaning that it is the same throughout.
775863
A compound contains two or more elements chemically joined together. A mixture contains two or more different substances that are not chemically joined together. The different substances in a mixture can be elements and/or compounds.
944995
Pure and impure chemical substances. A pure element or compound contains only one substance, with no other substances mixed in. Impure materials may be mixtures of elements, mixtures of compounds, or mixtures of elements and compounds.
696120
By definition, pure metals consist of a single element. Samples of these metals contain nothing but atoms of a single metallic substance. Alloys contain two or more elements or alloys melted and blended together, so their chemical formulas consist of more than one element.
957176
A compound is a pure substance composed of two or more different atoms chemically bonded to one another. That means that it can not be separated into its constituents by mechanical or physical means and only can be destroyed by chemical means. ... The constituent elements in a compound are in a fixed proportion by weight.
586374
Atoms and Ions have the same number of neutrons. A molecule is particle consisting of multiple atoms. Pure elements are substances composed of one type of atom where as a compound is made up of different types of atoms. Ionic compounds consist of metals and nonmetals and contain ions with charges.
1243951
All matter can be classified into two categories: pure substances and mixtures. A pure substance consists of a single element or compound. Iron is formed only of iron (Fe) atoms; table salt is formed only by sodium chloride (NaCl) molecules. A mixture, however, is made up of different compounds and/or elements.
479879
Elements are the purest form of a chemical substance and are composed of only one type of atom. In other words, all of the atoms in an element will have the same number of protons. ... A mixture is a combination of two or more different chemical compounds or elemental substances.
68717
Water is a compound made up of hydrogen and oxygen. ... Compounds are substances composed of two or more different elements. Compounds are also pure substances. A mixture is a physical combination of elements or compounds where the parts of the mixture are not chemically bonded and so retain their own identity.
688785
Difference Between Mixtures and Compounds. The mixture contains two or more substances mixed, but neither chemically as well as not in inexact quantity while compound includes two or more elements combined chemically and in a fixed ratio. ... Pure substances are made up of elements and compounds.
610033
A pure substance has a constant composition and cannot be separated into simpler substances by physical means. There are two types of pure substances: elements and compounds. Elements: are pure substances made up of only l type of atom. ... Elements cannot be broken down into anything simpler physically or chemically.
775495
Elements are pure substances which are composed of only one type of atom. Compound are substances which are formed by two or more different types of elements that are united chemically in fixed proportions. There are nearly 118 elements (at present) of which nearly 94 occur naturally on Earth.
965536
Matter can be classified into two broad categories: pure substances and mixtures. A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds.
213234
Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. ... A mixture is composed of different types of atoms or molecules that are not chemically bonded.