How Many Electrons in an Atom?

For an atom of an element:
number of electrons = number of protons = atomic number of element

AUS-e-TUTE has a new tutorial, game, test and drill to help you learn and apply this idea.
AUS-e-TUTE members should log-in to access these new resources.

If are not an AUS-e-TUTE Member, there is a "free-to-view" tutorial currently available at:
http://www.ausetute.com.au/noelectron.html

How Many Protons in an Atom?

number of protons in an atom = atomic number (Z) of the element

... and.... the periodic table of the elements lists the elements in or order of increasing atomic number!

Now, if you'd like to see AUS-e-TUTE's new tutorial on this topic, along with worked examples of exam questions, you will need to visit http://www.ausetute.com.au/noprotons.html

But, if you would like to play the game, answer the test questions, or do the drill, then you will need to become an AUS-e-TUTE Member at http://www.ausetute.com.au/register.html

World Science Festival Brisbane

World Science Festival is on in Brisbane between March 22^nd and 26^th 2017.
You can download the program guide here

http://www.worldsciencefestival.com.au/wp-content/uploads/2016/10/WSFB_2017_PROGRAM_GUIDE_11_WEB.pdf


This event has been advertised as exploring four themes:

1.  Physics + Space – the study of matter and its motion through space
2. Oceans – the health of our marine environment and the challenges facing water supply and sustainability
3. Energy – alternatives, supply and diversification
4. Robotics – engineering, computers and artificial intelligence.

If you are interested in "chemistry" then the pickings are slim and somewhat grim. Chemistry is, as usual, painted as the evil villain:

• chemistry kills the oceans as a result of industrialisation (acidification, climate change, plastic pollution) ... but "smart engineering" might be the hero of the piece
• chemistry kills marine ecosystems as a result of the break-up of plastics into "microplastics", but a panel of leading "environmental thinkers" will be discussing what to do about it
• chemistry gave us, presumably, "dirty energy"  when we learnt how to control the combustion of fossil fuels, but once again "smarter technologies" will lead to "clean energy" and "revolutionary" technology will make renewable energy more reliable apparently.

 I'm a little uncertain of how, when or why "engineering" and "technology" are seen in such a positive context, while chemistry seems to be painted as the evil sibling out to do as much damage to the environment and society as possible.

Similarly if you want to inspire your female students to take up further studies in chemistry, I don't think you're going to find much motivation here .... while Marie Curie is mentioned along side Jane Goodall (primatologist)  and Mary Jackson (aeronautical engineer), the participants in the discussion are Emma Johnston (marine ecologist), Suzanne Miller (marine geologist) and Kerrie Wilson (ecologist). I may be wrong, but it seems to me that women are well represented in the "marine science" and "biological science" areas.

If you are interested in "physics" then the "Gravitational Waves - A New Era of Astronomy" might be worth the $30-$35 ticket.

And ..... just a reminder .... you only have until 25^th April 2017 to visit the Large Hadron Collider Exhibition at the Queensland Museum .... and yes, that is really a worthwhile trip. The exhibition is fabulous!

Intravenous Anaesthetics

In the eighteenth century surgery was limited to essential operations, such as the amputation of gangrenous limbs, performed on conscious patients who were strapped in and held down by assistants.

By the mid-nineteenth century gases like ether and chloroform were being used to reduce pain during dentistry and childbirth. Then the hypodermic syringe was developed, allowing drugs to be injected directly into the blood stream resulting in drugs that acted quickly and predictably.

But it wasn't until the early twentieth century that intravenous anaesthetics, compounds that cause loss of consciousness, became available and revolutionized surgery. 

Discover some chemistry of intravenous anaesthetics in this issue of AUS-e-NEWS

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