We can split water into hydrogen and oxygen, but we cannot use chemistry to split oxygen or hydrogen into anything else. Real-life examples: The substances we know as carbon, oxygen, nitrogen, calcium, and gold are examples of elements. Used in a sentence: Ammonia is made of the elements...
An element is a fundamental item that can't be easily broken into smaller pieces. In chemistry and physics, an element is a substance that can't be broken down by non-nuclear reactions. In computing and mathematics, an element is a distinct piece of a larger system or set. Elements in ...
Thechemistryof titanium in the +2 state is rather restricted. By contrast, many compounds are formed by titanium in the +3 state. One of the more important is thetrichlorideTiCl3, a crystalline form of which is particularly useful as acatalystin the stereospecificpolymerizationof propylene to ...
Extra Examples chemistry (also chemical element) [countable] a simple chemical substance that consists of atoms of only one type and cannot be split by chemical means into a simpler substance. Gold, oxygen and carbon are all elements. All chemical substances, whether elements, compounds or ...
In chemistry what is the meaning of the term pure substance? Explain what an alloy is and how it is different from a compound. Describe the metallurgy of copper. Is wood classified as an element, a compound, or a mixture? Explain. ...
The periodic table is a chart that shows how chemical elements are related to one another. "Noble gas" suggests a group of elements that is "too far above other elements" to react with them. The noble gases are also called the inert gases. That term has the same meaning. The noble ...
noun , Chemistry, Physics. any element having an atomic number higher than 103, the last of the actinide series. These superheavy, radioactive elements are extremely short-lived, and can only be created in the laboratory.Discover More Word History and Origins Origin of transactinide element1 Fir...
ChemistryL-POxygen, Chemical Element OXYGEN Photo by: Molodec Overview Oxygen is the first element in Group 16 (VIA) of the periodic table. The periodic table is a chart that shows how chemical elements are related to each other. The elements in Group 16 are said to belong to the ...
fromWiktionary, Creative Commons Attribution/Share-Alike License. nounchemistryAchemicalelement present in a sample in very small quantities. nounbiochemistryA chemical element in an organism’sdietthat isrequiredin very small amounts in order to maintain properbiochemicalfunction; amicronutrient. ...
chemical element: Any one of the simplest <xref>chemical</xref> substances that cannot be <xref>decomposed</xref> in a chemical <xref>reaction</xref>. Chemical elements consist of <xref>atoms</xref> which have the same number of <xref>protons</xref>.