element definition
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- A chemical element or element is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z).n chemistry, a pure element means a substance whose atoms all (or in practice almost all) have the same atomic number, or number of protons. Nuclear scientists, however, define a pure element as one that consists of only one stable isotope.
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Chemistry A chemical element is a pure substance which is composed of a single type of atom, characterized by its particular number of protons in the nuclei of its atoms, known as the atomic number and represented by the symbol Z. The mass number is the sum of the number of protons and neutrons in a nucleus. Although all the nuclei of all atoms belonging to one element will have the same atomic number, they may not necessarily have the same mass number; atoms of an element which have different mass numbers are known as isotopes.
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Chemical element The term element is used for a kind of atoms with a given number of protons (regardless of whether they are or they are not ionized or chemically bonded, e.g. hydrogen in water) as well as for a pure chemical substance consisting of a single element (e.g. hydrogen gas).
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atom at•om. 1. the smallest component of an element having the chemical properties of the element, consisting of a positively charged nucleus of neutrons and protons that exerts an electrical attraction on one or more electrons in motion around it. 2. this component as the source of nuclear energy.
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element A substance that cannot be broken down into simpler substances by chemical means. An element is composed of atoms that have the same atomic number; that is, each atom has the same number of protons in its nucleus as all other atoms of that element. Today 112 elements are known, of which 92 are known to occur in nature, while the remaining 20 have only been made with particle accelerators.
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Questions and Answers An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron.If you change the number of protons an atom has, you change the type of element it is.or example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is.
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element 4. any group that is part of a larger unit, such as a military formation. 5. a small amount; hint: an element of sarcasm in her voice. 6. a distinguishable section of a social group: he belonged to the stable element in the expedition. 7. (Biology) the most favourable environment for an animal or plant.
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element Noun. 1. atom - (physics and chemistry) the smallest component of an element having the chemical properties of the element. substance-the real physical matter of which a person or thing consists; DNA is the substance of our genes.
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Definition of 'element' Definition of 'element'. element. The different elements of something are the different parts it contains. The exchange of prisoners of war was one of the key elements of the U.N.'s peace plan. A particular element of a situation, activity, or process is an important quality or feature that it has or needs.
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Questions and Answers An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is.
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- Answer: A chemical element, or an element, is a material which cannot be broken down or changed into another substance using chemical means. Elements may be thought of as the basic chemical building blocks of matter. Depending on how much evidence you require to prove a new element has been created, there are 117 or 118 known elements.
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Ha  (chemistry) chemical element [specialized] a substance that cannot be broken down into any simpler chemical substances and is made of atoms all of the same type (22 of 28 words) dictionary .cambridge .org /dictionary /british /chemical-element
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Review of Elements, Compounds, and Mixtures Elements. Any substance that contains only one kind of an atom is known as an element. Because atoms cannot be created or destroyed in a chemical reaction, elements such as phosphorus (P 4) or sulfur (S 8) cannot be broken down into simpler substances by these reactions. Example: Water decomposes into a mixture of hydrogen and oxygen when an electric current is passed through the liquid.
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Category:Chemical elements Wikimedia Commons has media related to Chemical elements. A chemical element is a substance that cannot be divided or changed into different substances by ordinary chemical methods. The smallest particle of such an element is an atom, which consists of electrons centered around a nucleus of protons and neutrons.
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- a component or constituent of a whole or one of the parts into which a whole may be resolved by analysis: Bricks and mortar are elements of every masonry wall. Chemistry. one of a class of substances that cannot be separated into simpler substances by chemical means.
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element legal Definition of element : one of the constituent parts (as a particular act, a mental state, or an attendant circumstance) of a crime as defined by statute that the prosecution must prove to win a conviction
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Chemical element The term element is used for atoms with a given number of protons (regardless of whether or not they are ionized or chemically bonded, e.g. hydrogen in water) as well as for a pure chemical substance consisting of a single element (e.g. hydrogen gas).
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Review of Elements, Compounds, and Mixtures Any substance that contains only one kind of an atom is known as an element. Because atoms cannot be created or destroyed in a chemical reaction, elements such as phosphorus (P 4) or sulfur (S 8) cannot be broken down into simpler substances by these reactions.
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element Save. element /ˈɛləmənt/ noun. plural elements. element. /ˈɛləmənt/. noun. plural elements. Learner's definition of ELEMENT. 1. [count] chemistry: one of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances.chemical elements. Water is composed of the elements hydrogen and oxygen.count] chemistry: one of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances. chemical elements. Water is composed of the elements hydrogen and oxygen.
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Definition of Element An element is a substance consisting of atoms which all have the same number of protons - i.e. the same atomic number. Elements are chemically the simplest substances and hence cannot be broken down using chemical methods. Elements can only be changed into other elements using nuclear methods. Although an element’s atoms must all have the same number of protons, they can have different numbers of neutrons and hence different masses. When atoms of the same element have different numbers of neutrons, they are called isotopes. The Most Abundant Elements
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- Elements and compounds are pure chemical substances found in nature. The difference between an element and a compound is that an element is a substance made of same type of atoms, whereas a compound is made of different elements in definite proportions. Examples of elements include iron, copper, hydrogen and oxygen.
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element 1) In chemistry and physics, an element is a substance that cannot be broken down into simpler components by any non-nuclear chemical reaction. An element is uniquely determined by the number of protons in the nuclei of its atoms. The number of protons in the nucleus of the atom of an element is known as the atomic number of that element. The number of electrons in the atom of a specific element can vary. If the number of electrons is the same as the number of protons, then the atom has no electric charge. However, if the number of electrons is different from the number of protons, the atom is called an ion. If there are more electrons than protons, it is a negative ion; if there are fewer electrons than protons, it is a positive ion. The number of neutrons in the atom of a specific element can also vary.
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Element Other uses in science and technology. Chemical element, a pure substance consisting of one type of atom. DNA element, a functional region of DNA, including genes and cis-regulatory elements. Electrical element, an abstract part of a circuit.
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atom atom. 1  Physics. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical attraction; the number of protons determines the identity of the element. 2  Energy.
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Element noun, plural: elements. (physics, chemistry) A substance that cannot be decomposed into simpler substances by chemical means, and is made up of atoms all with identical number of protons. (general). (1) A fundamental component of a composite entity (such as a vessel element that makes up the vessels in angiosperms).physics, chemistry) A substance that cannot be decomposed into simpler substances by chemical means, and is made up of atoms all with identical number of protons. (general). (1) A fundamental component of a composite entity (such as a vessel element that makes up the vessels in angiosperms).