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Compound definition a compound is a chemical species that is formed when two or more atoms join together chemically with covalent or ionic bonds.
Definition of element according to chemistry. Changing the number of neutrons produces. Bricks and mortar are elements of every masonry wall. Varying the number of electrons in an atom of an element produces ions. Elements can only be changed into other elements using nuclear methods.
An element is a substance whose atoms all have the same number of protons. According to roundy 1989 chemistry teachers confuse students by using outdated definitions of element. Another way of saying this is that all of a particular element s atoms have the same atomic number. An element is a substance that cannot be broken down into anything simpler heyworth 1999.
A chemical element is a substance that cannot be further broken down by any chemical reaction. Elements are chemically the simplest substances and hence cannot be broken down using chemical reactions. Below are three examples taken from textbooks. In chemistry an element is a pure substance which cannot be broken down by chemical means consisting of atoms which have identical numbers of protons in their atomic nuclei the number of protons in the nucleus is the defining property of an element and is referred to as the atomic number represented by the symbol z.
Each element has a unique number of protons in its atom. Element definition a component or constituent of a whole or one of the parts into which a whole may be resolved by analysis. Chemistry definition is a science that deals with the composition structure and properties of substances and with the transformations that they undergo. For example a hydrogen atom has 1 proton while a carbon atom has 6 protons.
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