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Natuurwetenskappe

Graad 8

Materie: klassifikasie

Module 20

Metale en nie-metale

  • ‘n Metaal is tipies ‘n harde, blink en sterk element wat elektrisiteit en hitte kan gelei.
  • Yster is die algemeenste metaal in gebruik in ons leefwêreld, maar nie in sy suiwer vorm nie. As yster met ‘n klein bietjie nie-metaal soos koolstof gemeng word, kry ons ‘n allooi .
  • Die studie van metale noem ons metallurgie .
  • Goud is alom die metaal wat ‘n simbool is van welvaart, terwyl platinum en palladium besonder waardevol is vanweë die gebruik daarvan in elektronika en gespesialiseerde ingenieurswese.
  • Staal is alombekend en miljoene ton word jaarliks gebruik in die vervaardiging van items soos wasmasjiene, motors, skepe en treine. Vlekvrye staal, wat onder andere in eetgerei gebruik word, word verkry deur staal in ‘n allooi met harde en blink chroom te vermeng.
  • ‘n Verskeidenheid van stowwe kan by yster gevoeg word om verskillende allooie te vorm, bv. mangaan, fosfor, silikon en swawel.
  • Aluminium word weer baie gebruik in koeldrankblikkies, lere, vensterrame en voorwerpe wat lig moet wees en nie moet roes nie. Aluminium is die derde mees algemene chemiese element op aarde, aangesien dit in ‘n groot deel van die aarde se kors voorkom. Koper en magnesium word gewoonlik bygevoeg om dit vir industriële gebruik geskik te maak.
  • Metale , veral die goud en silwer in elektroniese stroombane (en in tande!) kan suksesvol hersirkuleer word om ons natuurlike hulpbronne te beskerm.
  • Brons is een van die oudste allooie – ‘n mengsel van koper en tin.
  • Geelkoper (“brass”) is weer ‘n allooi van koper en sink.

Klasaktiwiteit

Uitken van metale en nie-metale

  • Identifiseer soveel moontlik van die stowwe in die prent en klassifiseer dit as metale en nie-metale na aanleiding van die hoofelement in die stof.
METALE NIE-METALE
.............................................................. ................................................................

1. Watter eienskappe het jy gebruik om te besluit watter stowwe metale en watter nie-metale is?

2. Dink jy die sekretaresse is welgesteld? Hoekom?

3. Watter stof is besig om die rol van metaal in die industrie oor te neem? Waaruit bestaan die stof?

4. Wat is metallurgie?

5. Wat is staal?

6. Voltooi die volgende tabel:

METALE NIE-METALE
hard en blink .......................................................................
plooibaar en smeebaar
gelei hitte
gelei elektrisiteit

7. Wat is die verskil tussen plooibaar en smeebaar?

Assessering van uitkenning

Kon jy die indeling korrek doen en jou kennis toepas?

[LU 2.2; 2.4]

Assessering

LU 2

Wetenskaplike Kennis

Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Dit is bewys as die leerder:

2.1 sinvolle inligting kan onthou;

2.2 inligting in kategorieë kan plaas;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

Memorandum

KLASAKTIWITEIT: UITKEN VAN METALE EN NIE-METALE

Metale:

Nie-metale:

1. blink, hard

2. goud

3. aanvraag

4. studie van metale

5. allooi

6.

METALE NIE-METALE
hard en blink verkillende kleure; nie hard
plooibaar en smeebaar Bros, breek
gelei hitte Nee
gelei elektrisiteit Nee

7. plooibaar – lang drade uitgerek

smeebaar – dun plate uitgeklop

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natuurwetenskappe graad 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11049/1.1
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