Here’s the complete list of 60 key terminologies for GCSE Chemistry:Atom: The smallest unit of an element, consisting of protons, neutrons, and electrons.Element: A substance made of only one type of atom.Compound: A substance formed when two or more elements chemically combine.Molecule: A ...
The elements that are formed naturally bynuclear fissionor through the intentional synthesis in nuclear reactors or particle accelerators are calledRadio Active Elements. All elements can have radioactive isotopes. If enough neutrons are added to an atom, it becomes unstable and decays. The increasing...
QDomNodeList elementNodes;//the list of all elementQDomElement domElement;//a single element//read in all elementselementNodes = dataDocument.elementsByTagName("element");constuint count = elementNodes.count();for( uint i =0; i < count; ++i ) {//iterate through all elementsdomElement = ...
All the terms related should be briefly interpreted in English and Chinese. Thank you!Atomic Structure (原子结构)Atom (原子): The basic unit of a chemical element.Nucleus (原子核): The central part of an atom containing protons and neutrons.Proton (质子): A subatomic particle with a ...
In the nucleus, protons and neutrons are cramped together in a really very small space. The protons in the nucleus, all being positively charged, repel each other! So if all the protons repel each other, how does the nucleus stay glued together and remain stable? It is because of the ‘...
Elements Elements are the building blocks used to make up every substance in the world and cannot be broken down into anything simpler Each element is made of the same type of atom Compounds A compound is made when atoms of different elements join together ...
All atoms contain components called subatomic particles. Neutrons are neutral particles that are found in the nucleus of the atom along with the positively charged protons. The number of protons determines the element identity of the atom, and neutrons help determine the particular isotope of the at...
He investigated emission spectra of heated elements, and discovered caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff. Bunsen developed several gas-analytical methods, was a pioneer in photochemistry, and did early work in the field of organoarsenic chemistry. With his ...
Synthetic elements are man-made elements. They do not occur in nature. To find out more about these elements, read on...
1. (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight. 2. a whole formed by a union of two or more elements or parts. 3. an enclosure of residences and other building (especially in the Orient). verb 1. make mo...