molecule - (physics and chemistry) the simplest structural unit of an element or compound free radical, radical - an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an ...
compounds, or mixtures. Element: a substance made of only one type of atom Compound: a substance made of two or more elements chemically bonded together. Mixture: a physical combination of two or more pure substances (i.e., elements or compounds). ...
Examples of substances that are not atoms include water (H2O),table salt(NaCl), and ozone (O3). Basically, any material with a composition that includes more than one element symbol or that has a subscript following anelement symbolis a molecule or compound rather than an atom....
the smallest particle of anelementthat has all the properties of the element. adj.,adjatom´ic.ƒThere are two main parts of an atom: thenucleusand theelectroncloud. The nucleus is made up ofprotons, which carry a positive electrical charge, and (except in hydrogen)neutrons, which contai...
When an atom loses or gains electrons, it becomes... An electrolyte A bond A compound An ion Atoms, Elements And Compounds Quiz Atoms, elements and compounds quiz Welcome everyone, to another wonderful quiz from the world of science. Today, we’ll be turning our collective attention to the...
Molar mass is the mass of Avogadro's number of atoms of that element or compound. Avogadro's number is 6.02 x 1023 and can be used to represent the number of representative particles of any particle on the atomic scale. The molar masses of the elements are listed on the periodic table....
a我想我们应该节约用水,做到人人有责 I thought we should save the water used, achieves everybody has a responsibility[translate] aa.概念:元素、原子、分子、化合物、同位素、元素周期律; a. concept: Element, atomic, molecular, compound, isotope, period of element law;[translate]...
compound e. ion Which term below includes the other terms? A) atom B) molecule C) electron D) element Define and distinguish between matter, elements, and compounds. What is the biological definition of an atom? Define the term element as used in many biological processes. The term below ...
A tiny particle of a chemical element is called an atom, which may or may not exist independently. Molecules refer to the group of atoms that the bond binds together, representing the smallest unit in a compound. Two or more identical or distinct atoms are chemically bonded. ...
15. Relating to the replacement of one of several atoms or radicals in a compound by another atom or radical. 原子序,原子构造限定在如链条上的连结环的空间构型里的一组原子 16. The most stable adsorption site for both oxygen and iodine atom on the silver surface is four-fold hollow site. ...