• Living Thing Cell Cells One
    4,633 words
    Living things make up the world as we know it. Living things are involved in our life constantly, seeing that we are alive. There are five characteristics that are common to all living things. Living things are made up of one or more cells. Each cell is made up of living matter and is separated by a barrier that encloses the cell from its surroundings. However, there are many different kinds of cells that make up living things. A single cell can be one organism. These organisms are known as uni...
  • Copper Atomic Number
    1,090 words
    Weil 1 Copper is one of the earliest elements known to man. Because of its distinct red color, Copper is very easily identified. In the ancient times, copper could be found lying in the ground in its unattached state without interaction to other substances. Copper and its compounds have many uses in today's society. Copper has many chemical properties that make it unique. The Atomic number of copper is 29. An Atomic number is a measure of the amount of protons in the nucleus of an atom. Protons...
  • The Development Of The Atomic Theory
    1,469 words
    The Greek concept of atomos: the atom Around 440 BC leucippus of Miletus originated the atom concept. He and his pupil, Democritus of ab dera refined it for future use. Their atomic idea has five major points. All original writings of leucippus and Democritus are lost. The only sources we have for there atomistic ideas are in quotations from other writers. Democritus was known as the "laughing philosopher" because he enjoyed life so much. At this time Greek philosophy was about 150 years old, e...
  • Table Of Elements Atomic Weight
    1,896 words
    A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. Although elements such as gold, silver, tin, copper, lead and mercury have been known since antiquity, the first scientific discovery of an element occurred in 1649 when Hennig Brand discovered phosphorous. During the next 200 years, a vast body of knowledge concerning the properties of elements and their compounds was acquired by chemists By 1869, a total of 63 elements had been disc...
  • Phases Of Matter Liquid Change Solid
    620 words
    SCIENCE Solution-type of mixture formed when I substance dissolves in another Energy-The 'colder' the phase, tends to have less energy Freezing Point-Temperature where liquid turns to solid Atomic Number-Number of protons in the nucleus of an atom Matter-Has mass and takes up space 4 phases of matter-solid, liquid, gas, plasma Mixture-Matter that consists of 2 or more substances mixed together but NOT chemically combined ex: salt, sugar Atom-Smallest particle of an element that has the propertie...
  • Nuclear Energy Power Plants Atoms
    1,019 words
    Nuclear Energy During the twentieth century scientists have discovered how to unleash the most powerful energy of all; Nuclear energy. The study of nuclear energy began for the same reasons that most scientific studies are begun; to understand more about the universe and the laws by which the universe works. The more knowledge we have about the universe, the more we can control the world in which we live. Nuclear energy is contained in the center, or nucleus of an atom. This energy is also known...
  • Analgesics Molecular Formula
    566 words
    Analgesics 'An aspirin a day keeps the doctor away.' Although this saying can be true, it is not only aspirin that can cure the pains of life, but also several other types of analgesics. There are a wide variety of analgesics. More commonly known as painkillers. The narcotic analgesics act on the central nervous system and change the user's perception; they are more often used for severe pain and can make the user develop an addiction. The nonnarcotic analgesics, known as over the counter or OTC...
  • Chemical Elements Atomic Number
    1,547 words
    At first glance, nature appears to consist of countless numbers of very different materials. The world thus appears to be an extremely complex mixture of many different materials. But philosophers and scientists have long held another view of the world. They have found it difficult to believe that nature is really as complex as it appears to be. Instead, they have assumed that the many different materials we see result from the combination of a small number of fundamental substances called eleme...
  • Atomic Mass Element Atoms Metals
    591 words
    Chapter Three Summary: Atoms and atom's structure Ancient Greek Philosophers suggested that matter was composed of individual particles, which was proved by the theory of John Dalton. The main provisions of his theory are: 1. All matter is composed of tiny, indivisible particles called atoms. 2. All atoms of a particular element are identical but the atoms of one element differ from the atoms of other element. 3. Atoms of different elements combine with each other in certain whole number propor...