Version 1 Information for teachers

These slides are intended for various age ranges. To remove slides (including this one) and make the presentation more appropriate, perhaps for younger pupils, make a copy of the file, choose the “Normal” View of PowerPoint, select and delete the slides you don’t want. The format is intentionally “customisable”. To delete or amend any text select the text with the slide in “Normal” View and edit it.

If you don’t have the facility to project the presentation in class some of the slides are “static” and so could be printed on OHP transparencies.

There is no scoring structure to the questions so that teachers have the opportunity to use them any way they like. One approach would be to divide a class into teams, appoint a scorer in each team and award points as you go along. Alternatively the whole thing could be done as a class discussion. Some slides may need more teacher intervention than others eg the “odd ones out” sequence. The “Making Models” slides can be used with molecular model kits or by drawing the structures on paper.

If you have any ideas for questions or activities to extend this resource, perhaps things you already use as at the end of term, then please pass them on to me and I’ll include them: Steve Lewis e-mail [email protected]

Elements

Symbol Spelling

Use your Periodic Table to make as many words as you can in one minute using only symbols of the elements.

Examples : COW = carbon oxygen tungsten CrOW = chromium oxygen tungsten HeN = HeAtEr = helium nitrogen helium astatine erbium

Extra credit for the longest word found!

Identify the element

Discovered in 1808 by Sir Humphry Davy The name is derived from the Latin word meaning lime.

A silvery white, soft metal that reacts with water. One of the most abundant elements on Earth. There are vast deposits of its carbonate. When heated in kilns the carbonate of this element gives off carbon dioxide gas to leave quicklime. This reacts violently with water to give slaked lime. Answer

:

calcium

Identify the element

Discovered by Joseph Priestley in Wiltshire, England and independently by C.W. Scheele in Uppssala, Sweden in 1774.

The name is derived from the Greek word meaning “ acid forming ” , although this name is misleading nowadays.

A colourless, odourless gas.

This element is essential for all forms of life since it is a constituent of DNA, and it comprises over half the mass of the average person. Answer

:

oxygen We it breathe in so that it can react with energy stores in our bodies to provide the heat and motion that keeps us alive.

Identify the element

Discovered by Hennig Brandt in 1669 The name is derived from the Greek word meaning “ bringer of light ” , because it glows in the dark.

There are several different forms including White and Red. White is spontaneously flammable when exposed to air above 30 °C and is a deadly poison. Red is made by gently heating white. Red is used mixed with powdered glass stuck on the side of boxes of safety matches for matches to be struck against to light them.

Answer

:

phosphorus

How many atoms in Chemistry?

Chemistry

This was written using a graphite pencil. How many atoms of carbon are used to write the word?

Data : mass of paper + word = 0.412 g mass of paper = 0.409 g Atomic mass of carbon = 12.0 g mol -1 Avogadro’s number = 6.0 x 10 23 mol -1

What’s in a name?

Odd names

Give the name we use and formula for …..

bicarbonate of soda limestone slaked lime dihydrogen oxide acetylene formaldehyde milk of magnesia paraffin olefin acetone acetic acid caustic soda ethylene potash

Making Models

Make models of the following molecules

Using the key:

C N O

H

Cl

single bond double bond triple bond

1.

2.

3.

4.

6.

7.

carbon dioxide water ammonia ethene ethanoic acid methanol

Make models of the following molecules

1.

2.

3.

4.

6.

7.

Using the key:

C

single bond

N O

H

Cl methylpropane ethanol ethanal 2-hydroxypropanenitrile 2-aminopropanoic acid chloromethylethanoate

double bond triple bond

Odd ones out

Identify the odd one out

Maxwell Einstein A B C Boltzmann Maxwell-Boltzmann Distribution D

Temperature absolutely!

Odd beardy out

Clues

Lord Kelvin Mendeleev

I get the credit for dreaming up the Periodic Table!

Workers of the World unite!

A B Van der Waals Karl Marx C D

Intermolecular forces are named after me!

Odd polymer out

Clues

first “plastic” toothbrush 1920’s stockings Cannot shed Cannot grow soggy silk invented nylon in 1935 Wallace Hume Carothers polymer scientist

[ CO(CH 2 ) 4 CONH(CH 2 ) 6 NH ] n

condensation polymer nylon 66 structure

Odd Couples

In the laboratory

Name these two men whose inventions are often found in the chemistry laboratory……

Clues

Answer

: Mr Bunsen and Mr Liebig

Always together

Name these two men, who are forever joined by a hyphen:

Clue

:

Answer

:

H H + Bronsted-Lowry H + H

References

Steve Lewis for the Royal Society of Chemistry

Sources of Images

Identify the element: From the RSC Databook CD-ROM. T he RSC has been granted the sole and exclusive right and licence to produce, publish and further license the Images used in these three slides.

Photos of Chemists: from the Famous Scientists website h ttp://dbhs.wvusd.k12.ca.us/Gallery/GalleryMenu.html

Odd polymer out: from the “Nylon Drama” website www.si.edu/lemelson/centerpieces/whole_cloth/u7sf/u7materials/ nylondrama.html