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Natural sciences

Grade 8

Matter: classification

Module 19

Elements and compounds

Elements

  • One of the basic sets of information in the natural sciences is represented in the list of elements.
  • We refer to it as the Periodic Table.
  • There are 112 elements in this table, and 90 of them occur naturally on our planet and as far as we know in the surrounding space.
  • The rest are manufactured synthetically in laboratories.
  • The elements are arranged according to qualities like mass and density, and according to how they are chemically compounded.

Assignment

  • Collect information on Mendeleev (1834-1907) ) and on how he devised the periodic table.
  • Add this to your poster about scientists through the ages.

http://smallfry.dmu.ac.uk/chem/tables

Class activity: listening skills

Listen attentively to the educator’s explanation and complete the following.

The Periodic Table

1. The horizontal lines are known as

2. The vertical lines are known as

3. In what part of the periodic table do we find the metals?

4. Which metals are stored under paraffin? Why?

5. What do we call these metals?

6. In what part of the periodic table do we find the non-metals?

7. Which non-metal is stored under water? Why?

8. Where do we find most of the gases? Explain this

9. Which gases do not react with other substances?

10. What is the name of this group of gases?

11. Name the lightest gas

12. Which elements occur in liquid phase at room temperature?

13. Which element sublimates?

14. In which phase do most elements occur at room temperature?

15. Why do we place particular elements in the same group?

Elements and their Symbols

  • Transfer the names of the elements and their symbols to the periodic table on the following page.
  • Apply colour to indicate the different groups.]LO 2.2]

Assessment of listening skills

Test yourself: are you able to answer questions 1 – 15 without referring to the answers?

[LO 2.1]

Group work: quiz

Any question that cannot be answered must be investigated.

Which element do we have here ?

[LO 2.1]

 Do you know the following? 

Some elements, like

CARBON

occur in various forms:

diamonds

coal, and the

graphite in your pencil!

http://education.jlab.org/itselemental/ele006

http://mineral.galleries.com

Assessment

Learning outcome 2: Constructing science knowledge

The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

We know this when the learner

2.1 is able to recall significant information;

2.2 is able to categorise information.

Memorandum

1. periods

2. groups

3. below left and in the transition block

4. Li, Na, K – reactive with water vapour

5. Alkali metals

6. Below right

7. P – reactive with oxygen

8. On the extreme right

9. Gases on extreme right

10. Noble gases

11. H

12. Br and Hg

13. Iodine

14. Solid substance

15. Corresponding qualities

The PERIODIC TABLE OF ELEMENTS

1. periods

2. groups

3. below left and in the transition block

4. Li, Na, K – reactive with water vapour

5. Alkali metals

6. Below right

7. P – reactive with oxygen

8. On the extreme right

9. Gases on extreme right

10. Noble gases

11. H

12. Br and Hg

13. Iodine

14. Solid substance

15. Corresponding qualities

ELEMENTS AS SYMBOLS

GROUP WORK:QUIZ

1. Mg

2. Titanium

3. Fe

4. He

5. Cu

6. H

7. Ag

8. S

9. Br

10. Ar

11. Co

12. Ca

13. P

14. Si

16. Cl

17. K

18. Cr

19. Ne

20. Cyanide

21. Al

22. N

23. Kr

24. Na

25. Zinc

CLASS ACTIVITY: RECOGNITION OF METALS AND NON-METALS

Metals:

Non-metals:

1. shiny, hard

2. gold

3. demand

4. study of metals

5. alloy

6.

7. Pliable – long threads stretched out.

Malleable – hammered into thin plates/sheets.

GROUP WORK: QUIZ

1. Mg

2. Titanium

3. Fe

4. He

5. Cu

6. H

7. Ag

8. S

9. Br

10. Ar

11. Co

12. Ca

13. P

14. Si

16. Cl

17. K

18. Cr

19. Ne

20. Cyanide

21. Al

22. N

23. Kr

24. Na

25. Zinc

GoldAuVM

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
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
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
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
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Source:  OpenStax, Natural sciences grade 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11050/1.1
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