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Compounds. A compound is a substance that contains two or more elements chemically combined in a fixed proportion. The elements carbon and hydrogen combine to form many different compounds. One of the simplest is called methane, in which there are always four times as many hydrogen atoms as carbon atoms. Methane is a pure substance because it ...
- Chemical Formulas
A chemical formula is an expression that shows the elements...
- Chemical Formulas
Sep 21, 2022 · A combination reaction is a reaction in which two or more substances combine to form a single new substance. Combination reactions can also be called synthesis reactions. The general form of a combination reaction is: A + B → AB A + B → AB. One combination reaction is two elements combining to form a compound.
Jun 13, 2023 · Combination Reactions. Combination reactions describe a reaction like this: A + B → C (1) (1) A + B → C. in which two or more reactants become one product (are combined). The problem with this term is that it doesn't give you much chemical insight because there are many different types of reactions that follow this pattern.
May 13, 2017 · A combination of two or more elements chemically combined is a compound . Compounds can be molecular or ionic. In a molecular compound, the electrons of the elements making it up are shared, forming covalent bonds. The smallest particle of a molecular compound that has the properties of that compound is a molecule. In an ionic compound, atoms lose or gain electrons and form positive or ...
As it stands, this is what I understand them to mean: Compound: two or more different atoms bonded together. Mixture: two or more different atoms together but not joined. Molecule: two particles (same or different) bonded together. Element: only 1 type of atom; this definition is applied to things both bonded and not to itself.
compound A pure substance made from two or more elements which are chemically bonded in a fixed ratio. and. mixtures. close. mixture When two or more compounds or elements are present without ...
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Brass is an example of a mixture of two elements: copper and zinc. It can contain as little as 10%, or as much as 45%, zinc. Another difference between compounds and mixtures of elements is the ease with which the elements can be separated. Mixtures, such as the atmosphere, contain two or more substances that are relatively easy to separate.
