atom: The basic unit of a chemical element. An atom consists of a dense nucleus containing positively charged protons and uncharged neutrons. A cloud of negatively charged electrons orbits the nucleus.
atomIt has to do with atoms, the smallest units that make up chemical elements.
calcium: A chemical element and alkali metal commonly found in minerals in the earth’s crust and sea salt. It is also found in bone minerals and teeth and plays a role in the movement of certain substances in and out of cells.
Chemicals: A substance formed by two or more atoms combining in a certain ratio and structure. For example, water is a chemical formed by two hydrogen atoms combining with one oxygen atom. Its chemical formula is H2O. Chemical can also be used as an adjective to describe the properties of substances that result from various reactions between different compounds.
Attenuation: (in radioactive materials) The process by which a radioisotope (a physically unstable form of an element) releases energy and elementary particles. Over time, this release changes the unstable element into a slightly different but stable element. For example, uranium-238 (a radioactive, or unstable, isotope) decays into radium-222 (also a radioactive isotope), which decays into radon-222 (also radioactive), which decays into polonium-210 (also radioactive), which decays into stable lead-206. No further decay occurs. The rate of decay from one isotope to another ranges from less than a second to billions of years.
element: A building block of a larger structure. (In chemistry) Any of over 100 substances whose smallest unit is a single atom. Examples include hydrogen, oxygen, carbon, lithium, and uranium.
Forge: (verb) To shape metals under heat and pressure, or (colloquially) to form one element from another under the intense heat and pressure of the interior of a star.
hydrogen: The lightest element in the universe. As a gas, it is colorless, odorless, and highly flammable. It is an essential part of many fuels, fats, and chemicals that make up living tissues. It consists of one proton (which acts as the nucleus) and one electron orbiting it.
ion: (adjective: ionized) An atom or molecule that has become electrically charged by the loss or gain of one or more electrons. An ionized gas, or plasma, is one in which all electrons have been separated from their parent atoms.
neutron: A subatomic particle with no electric charge and one of the basic elements of matter. Neutrons belong to a group of particles called hadrons.
Nuclear: The plural is nuclei. (physics) The central nucleus of an atom, which makes up most of its mass.
particle: A trace of something.
Physics: The scientific study of the nature and properties of matter and energy. Classical physics describes the nature and properties of matter and energy based on explanations such as Newton’s laws of motion. Quantum physics, a later field of study, is a more precise way of describing the motion and behavior of matter. Scientists who work in these fields are called physicists.
proton: A subatomic particle that is one of the basic building blocks of atoms that make up matter. Protons belong to a group of particles called hadrons.
Radioactive: Adjective used to describe an unstable element, such as certain forms (isotopes) of uranium or plutonium. Such elements are said to be unstable because their nuclei give off energy that is carried away by photons or one or more elementary particles. This energy release occurs through a process called radioactive decay.
tactics: An action or plan of action to accomplish a particular feat.
Source: www.snexplores.org
