Chemistry - Module 2 - Metal 1. Metals have been extracted and used for many thousands of years * Outline and examine some uses of different metals through history‚ including contemporary uses‚ as uncombined metals or as alloys. Contemporary Uses of common metals Metal | Uses | Iron and Steel (an alloy with <2% carbon)Good tensile strength‚ cheap‚ rusts (corrodes) | - Railways‚ bridges‚ buildings- motor cars bodies‚ ships and trains- Engine blocks‚ fire hydrants‚ drainage
Free Periodic table Chemical element Metal
Oxidation & Reduction I. Metal-Metal Ion Displacement II. Halogen Displacement Reactions INTRODUCTION A series of experiments had been conducted to determine the order of displacement strengths of the metals and halogen chosen for the experiments. A displacement reaction is a reaction in which one element(metal or non-metal) displaces another element(metal or non-metal) from its salt solution. In the displacement reaction of metals‚ the more electropositive metal will displace the less
Free Oxidizing agent Chlorine Hydrogen
1121 theory Topic 1 BDA/inventory * Time period assumptions: firm would find it desirable to report their financial statements more frequently therefore the economic life could be divided into artificial time periods. * Why are adjusting entries required? The purpose of balance day adjustment is to recognise revenue and expenses in the relevant Period. * Compare and contrast the purposes of adjusting entries‚ closing entries and reversing entries The purpose of closing entry is
Premium Marketing Management Health care
extract a metal Industrial mineral- either has some direct practical use‚ or take part in some industrial process Gems and precious stones are an exception to industrial metals as they do have a direct ‘practical’ application but are dealt with separately. Some common minerals include: * * Silica- (silicon dioxide) most common mineral on earth * Calcite- (calcium carbonate) main mineral in limestone and marble Ore: A naturally occurring solid material from which a metal or valuable
Premium Copper Aluminium Mineral
Lignite Bituminous(the common variety of coal)-grey black Anthracite(best variety of coal)hard coal % of carbon content 50-60 Uses 60-70 70-80 In thermal power plants Household fuel 90-95 As a reducing agent for the extraction of metals. The different varieties of coal formed depend on how long and at what temperature and pressure the coal is buried under the surface of the earth. Peat is the most inferior quality coal and anthracite the most superior quality coal. Bituminous
Premium Coal Petroleum Natural gas
The basic hypothesis is a social hypothesis‚ which is known to censure and attempting to change society all in all. Basic Theory and The Sociological Imagination were made. Sociological Imagination is made to convey attention to issues and Critical Theory was made to take care of issues. The conventional hypothesis just portrayed and clarified society. Scholars‚ for example‚ Max Horkheimer‚ T.W. Adorno‚ Herbert Marcuse‚ were the fundamental scholars who participated in the Frankfurt School‚ In Germany
Premium Scientific method Theory Science
Running Head: BASIC FAMILY SYSTEMS THEORY AND MICROSKILLS Basic Family Systems Theory and Microskills Used by the Helper Basic Family Systems Theory and Microskills Used by the Helper In terms of a system‚ the meaning is a consistent arrangement of things connected to form unity or to operate as a whole. These systems are dated back in origins to the 1950’s and 1960’s. In this theory we must understand an individual’s family and how it works for that family daily in the community‚ neighborhood
Premium Family therapy Family Cybernetics
MATERIALS : METALS AND NON-METALS Y Iron Coal ou are familiar with a number of materials like iron‚ aluminium‚ copper‚ etc. Some materials have been given in Table 4.1. Table 4.1 : Appearance and Hardness of materials Object /Material Appearance Hardness (Shiny/Dull) (Very hard/ Not very hard) similar change if we try to beat a wood log ? Let us find out. Activity 4.1 Take a small iron nail‚ a coal piece‚ a piece of thick aluminium wire and a pencil lead. Beat the iron nail with
Premium Oxygen Sulfuric acid Copper
Basic Concepts in Attachment Theory Attachment theory is the joint work of John Bowlby and Mary Ainsworth (Ainsworth & Bowlby‚ 1991 ). Drawing on concepts from ethology‚ cybernetics‚ information processing‚ developmental psychology‚ and psychoanalysts‚ John Bowlby formulated the basic tenets of the theory. He thereby revolutionized our thinking about a child’s tie to the mother and its disruption through separation‚ deprivation‚ and bereavement. Mary Ainsworth’s innovative methodology not only
Premium Attachment theory
Metals & Non-Metals Metals: Good conductors of heat and electricity. Have shining luster. Malleable (this means that they can be hammered or distorted). Ductile (this means that they can be drawn into wires). Most have high melting and boiling points. Are sonorous (give out sound when beaten). Usually solid at room temperature. An exception to this is mercury‚ which is liquid in nature. Examples: Aluminum‚ Gold‚ Copper‚ Silver‚ Sodium‚ Potassium‚ Mercury. Corrode or oxidize in
Premium Periodic table Atom Electron configuration