Atoms are made up of a nucleus, protons and electrons. Atoms are the basic units of matter and the defining structure of elements. The term "atom" comes from the Greek word for indivisible, because it was once thought that atoms were the smallest things in the universe and could not be ...
Volume is an extrinsic property—that is, a property or characteristic that depends on sample size—which describes a region in three-dimensional space. Simple, right? There are many subtly different but equally correct definitions of matter and mass. Anything made of atoms or molecules has ...
Every element is made of atoms—piles of paper clips. All atoms of any element are the same—all the paper clips in the pile are the same size and color. Atoms of different elements are different in size and properties—like different sizes and colors of paper clips. Atoms of different ...
Chemistry is a physical science that deals with the matter. One of the main topics in chemistry is how various molecules are formed from the 118 known chemical elements.Answer and Explanation: The elements are made out of atoms. Atoms are made out of subatomic particles called electrons, ...
Atoms at negative absolute temperature are the hottest systems in the world January 04, 2013 Energy Quantum Physics What is normal to most people in winter has so far been impossible in physics: a minus temperature. On the Celsius scale minus temperatures are only surprising in summer. On the...
Magnets don't delete things from hard drives because hard drives themselves are generally made with powerful magnets inside of them. If you leave a strong electromagnet close to a hard drive, it could cause damage to the hard drive, but this rarely happens. ...
Living things, for example, are mostly made from the atoms carbon, hydrogen, and oxygen. These are just three of over 100 chemical elements that scientists have discovered. Other elements include metals such as copper, tin, iron and gold, and gases like hydrogen and helium. You can make ...
What types of atoms typically form ionic bonds?Name each of these common acids: (a) H3PO4(aq) (b) HC2H3O2(aq) (c) H2CO3(aq)Give the general formula for a carboxylic acid. Name the characteristic group it contains.What are the most common names for these compounds and ions? (...
It is made up of an equal number of atoms of sodium and chlorine. "Ordered internal structure" means that the atoms in a mineral are arranged in a systematic and repeating pattern. The structure of the mineral halite is shown in the illustration on this page. Halite is composed of an ...
Introduction 1、There are many elements constituting(组成) European Culture. 2、There are two major elements: Greco-Roman element and Judeo-Christian element. 3、The richness(丰富性) of European Culture was created by Greco-Roman element