• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

material science unit 2 task 1

Extracts from this document...

Introduction

Material assignment Element: An element is a substance made of only one type of atom, and it contains the same amount of protons, neutrons and electrons in every atom, e.g. sodium, chlorine, iron, hydrogen and potassium. Atomic symbol: Na Name: sodium 2,8,1 Relative atomic mass: 23 Atomic number: 11 Compounds: are substances made from 2 or more elements and compounds that are chemically bonded, they carry 2 or more different types of atoms they can bond in different ways like covalent, metallic, ionic, Ionic bonding Sodium atom (Na) Sodium ion it has lost an electron. Sodium reacts through ionic bonding with chlorine. Atomic symbol: Cl Name: chlorine 2,8,7 Relative atomic mass: 35 Atomic number: 17 Chlorine atom (Cl) The atoms are held together by the strong electrostatic attraction between the negative and positive charges in the 2 ions. Na 2,8 ,1 Na+ 2,8 Cl 2,8,7 Cl- 2,8,8 formula: Na+Cl- 1 H 2 He 3 Li 4 Be 5 B 6 C 7 N 8 O 9 F 10 Ne 11 Na 12 Mg 13 Al 14 Si 15 P 16 S 17 Cl 18 Ar 19 K 20 Ca 21 Sc 22 Ti 23 V 24 Cr 25 Mn 26 Fe 27 Co 28 Ni 29 Cu 30 Zn 31 Ga 32 Ge 33 As 34 Se 35 Br 36 Kr 37 ...read more.

Middle

for example: Copper (Cu) Sodium (Na) Magnesium (Mg). Metallic bonding is the attraction of metal ions e.g. Cu 2+ (Copper cation ) and the delocalised electrons. (Opposite charges attract). Cu2+ e- Cu2+ e- Cu2+ e- Cu2+ Cu2+ e- Cu2+ e- Cu2+ e- Cu2+ Cu2+ e- Cu2+ e- Cu2+ e- Cu2+ Cu2+ e- Cu2+ e- Cu2+ e- Cu2+ Cu2+ e- Cu2+ e- Cu2+ e- Cu2+ To return a compound in to its original reactant elements a chemical reaction is needed. for example to change water(H2O) to its original elements 2H (2 hydrogen ) and one O (oxygen), one must heat up the compound, once this process has taken place oxygen and hydrogen gas are given off, this is called a reverse reaction where, one can react the elements to gain a compound and then react the compound again to gain the original elements. during some reverse reactions once the point of equilibrium is reached no more reactions will take place. 2H + O (H2O) Elements are substances made from only one type of atom, these atoms all contain the same number of protons, neutrons and electrons. compounds are substances made from 2 or more types of elements, and these substances contain two or more types of atoms and they bond through different ways to gain their energetic stability, for example, metallic, ionic and covalent bonding. ...read more.

Conclusion

www.funsci.com/fun3_en/exper2/exper2.htm Aerosol mixtures: This is the desperation of small solid particles to dissolve in a liquid solution; although these solutions resemble a real compound solution they are not, this can be tested by: shine a light on a sol mixture, although the solid particles are very small they are still able to diffuse parts of the light, this process is called 'Tyndall' some examples of a sol mixture are: clay and water mixture. Gel mixtures: This is the desperation of small solid particles to dissolve in a liquid solution. Gel mixtures have the same characteristics as a sol mixtures in fact if you add water to a gel mixture it becomes a sol mixture and in reverse if you increase the concentration of solid materials of a sol mixture it will become a gel, solution, the only difference is it's gelatinous properties and the fact that even though a gel might be gelatinous at room temperature e.g. broth gelatine, if you heat it up it will become liquid, and vice versa but some gel mixtures will not reverse to their original state for example, the white bit in eggs, once the gelatine is heated it will take a solid state and it will not change back to its original state. * www.newi.ac.uk/buckleyc/bonding.htm-21k * www.chemguide.co.uk/atoms/bonding/ionic.html-13k- * www.wpbschoolhouse.btinternet.co.uk/page04/4_72bond.htm#molecules * http://library.thinkquest.org/11430/research/hydrogen.htm * http://answers.yahoo.com/question/index?qid=20070603081901AA6DwDQ * http://en.wikipedia.org/wiki/Methane-17k * http://kentsimmons.uwinnipeg.ca/cm1504/Image55.gif * http://qldscienceteachers.tripod.com/junior/chem/metals.html * www.corrosionsource.com/handbook/periodic/ * www.answers.com/topic/emulsion * www.funsci.com/fun3_en/exper2/exper2.htm * http://www.claytoncramer.com/weblog/2005_05_22_archive.html ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Classifying Materials section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Classifying Materials essays

  1. Marked by a teacher

    Identifying an Ionic Compound. Objectives: To learn and test for metal ions ...

    5 star(s)

    and mixed with sodium which is white would yield to a light yellow- which was the color of my unknown compound. But my hypothesis turned out to be partially correct as the tests indicated that Sodium Sulfate was present but no sodium (as it did not react with the flame)

  2. The rates of reaction between CaCO3 and HCL

    Recordings of mass were taken using to mechanical devices, a stop clock and a balance, with both of these a chance of error occurs which is affected by different human errors: * Movement of the balance * Extra weigh applied to the surface *

  1. Bateries reasearch task

    These cells differ in there chemistry, cost/practicality, impact of society and impact on the environment. The dry cell consists of a zinc outer casing which acts as the negative electrode. An aqueous paste of ammonium chloride, powdered carbon and manganese dioxide around the carbon cathode create the rest of the cell.

  2. Ionic and Covalent Bonding ...

    than the other, the one with greater force has a bigger share of electron density, so therefore becomes slightly negative. When this happens the other atom will become slightly positive. This type of bond is known as a polar bond.

  1. Redox reactions and the halogens.

    Stock notation Copper (II) oxide where (II) = +2 oxidation number. Balancing equations using oxidation numbers 2Br-(aq) + Cl2(aq) ? 2Cl-(aq) + Br2(aq) 2 x (-1) (0) 2 x (-1) (0) Disproportionation Halogens have variable oxidation numbers E.g. Iodine 3I2(s)

  2. Affect of concentration on reaction

    1.3820 1.3770 1.3795 45 1.3970 1.3900 1.3935 50 1.4090 1.3950 1.4020 1.6 M Time (s) 1st Mass Loss (g) 2nd Mass Loss (g) Average Mass Loss (g) 0 0.0000 0.0000 0.0000 5 0.9990 1.0520 1.0255 10 1.0730 1.1050 1.0890 15 1.1120 1.1310 1.1215 20 1.1320 1.1550 1.1435 25 1.1480 1.1630

  1. To conjecture the structure and bonding of eight unknown solids by analysis of experimentally ...

    All these properties indicate: "an ionic substance with a rigid network lattice structure of an infinite array and strong bonds in three dimensions." UNKNOWN SOLID G: * Soluble in polar solvent - Substance is polar/ionic itself * Not Conductive - In neither solid nor aqueous solution state are charged particles

  2. Our experiment consisted of two samples of water containing unknown substances, and our objective ...

    Also, by dropping it, you risk damage to the equipment. 9. We decided on 20cm3 to be the volume we use to sample both of the samples. When putting 20cm3 into the measuring cylinder, we used a pipette to have more control over the amount of liquid we were putting into the cylinder.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work