Chemistry Periodicity in properties part 23 (Oxidation state in Periodic table) CBSE class 11 XI
Chemistry Periodicity in properties part 23 (Oxidation state trend in Periodic table) CBSE class 11 XIFrom:ExamFearVideosViews:0 0ratingsTime:12:08More inEducation
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Chemistry Periodicity in properties part 23 (Oxidation state in Periodic table) CBSE class 11 XI - Video
And the fifth day of Christmas is already upon us… well by the reckoning of Chemistry World‘s Christmas quiz anyway. If you want to check out yesterday’s quiz questions then you can find them here.
On with the quiz and today’s questions.
A Southampton University chemistry lab was shut after a PhD student had to be treated for poisoning. Which two elements were they poisoned with?
Multiple papers came out this year casting more and more doubt on the claim that the bacterium GFAJ-1 can take up arsenic and incorporate it into its DNA backbone. What does GFAJ-1 stand for?
On to the answers from yesterday’s quiz.
This year’s chemistry Nobel laureates were Robert Lefkowitz and Brian Kobilka for their work on G-coupled protein receptors. You can read all about their work on these important drug targets in our feature, A signal honour.
India was the country that claimed a domestic drug discovery first with Synriam made by pharmaceutical firm Ranbaxy. However, the active ingredient of Synriam was actually discovered in a drug screen by the Swiss charity Medicines for Malaria Venture. Read our story on the drug here.
That’s it for this week, but we’ll be back on Monday with more brain teasers.
Source:
http://prospect.rsc.org/blogs/cw/2012/12/07/chemistry-world-christmas-quiz-day-5/
Chemistry Periodicity in properties part 24 (Anomalous properties second period) CBSE class 11 XI
Chemistry Periodicity in properties part 24 (Anomalous properties of second period elements) CBSE class 11 XIFrom:ExamFearVideosViews:0 0ratingsTime:07:39More inEducation
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Chemistry Periodicity in properties part 24 (Anomalous properties second period) CBSE class 11 XI - Video
The answer’s to these questions can be found here. Day 4 of the quiz can now be found here.
On the third day of Christmas… Well, you get the idea. It’s day 3 of the Chemistry World quiz.
Today’s first question is: Why was this (erroneous) structure of a chemical, isolated from fungi found on a dead log in Siberia, back in the news this year, after first causing controversy back in 2006?
What is this structure?
Who became president of the Royal Society of Chemistry in July?
And now the answers to yesterday’s quiz. The giant of organic synthesis who joined Rice University was none other than K C Nicolaou.
The nerve gas that researchers at the Los Alamos National Laboratory figured out how to destroy safely using computer simulations was VX. Nicholas Cage’s approach to dealing with VX in the film The Rock could be described as rather more hands on! Finally, for the bonus point, the chemical name of VX is (O-ethyl S-[2-(diisopropylamino)ethyl] methylphosphonothioate). Very well done if you got that. You can read about the LANL scientists’ work here.
As always, don’t phone, it’s just for fun!
Source:
http://prospect.rsc.org/blogs/cw/2012/12/05/chemistry-world-quiz-day-3/
Its synthesis kickstarted organic chemistry and it’s widely used in industry. But did you know that urea is pretty much odourless?? Find out more in this week’s Chemistry in its element
Source:
http://prospect.rsc.org/blogs/cw/2012/12/05/chemistry-in-its-element-urea/
What is the genus of a calling bird anyway?
The answer’s to these questions and day 5 of the quiz can now be found here.
So, straight on to day 4 of the Chemistry World round up of the year quiz. If you want to catch up with yesterday’s questions you can see them here.
This year the Nobel prize in chemistry went to work on G-protein coupled receptors. Which two scientists were awarded the prize?
In April, the antimalarial drug Synriam was claimed to be the first domestically developed drug for which emerging economy?
And now the answers from yesterday.
The chemical structure was the purported configuration of hexacyclinol in a 2006 paper from James La Clair. The paper came in for considerable criticism from the synthetic organic community and was eventually retracted in November of this year.
New structure for hexacyclinol
And the new president of the Royal Society of Chemistry is, of course, Lesley Yellowlees.
Stay tuned for tomorrow’s questions.
Source:
http://prospect.rsc.org/blogs/cw/2012/12/06/chemistry-world-christmas-quiz-day-4/
The answers to day 1′s questions and the next day’s quiz questions can be found here.
‘Tis the season to be jolly. This also means that it’s time to look back on what’s happened over the past year and take stock. So, here at the Chemistry World Christmas fortress, we’ve put together a quiz looking back at some of the year’s best research in the chemical sciences, events that shook the chemistry community and a few Christmas themed posers thrown in for good measure! We’ll be posting a couple of questions every day on our blog. Check back the next day for the answers and the next set of questions. The comments section, as always, is open for your responses, but we won’t publish any that contain the answers to the questions posed until the next day.
First up, cast your mind back to the summer. Below is an atomic force microscopy image of a molecule synthesised by Anish Mistry and David Fox at Warwick University to celebrate the London 2012 Olympic games. What is its name?
Name that molecule!
In June, which US inorganic chemist retracted a series of papers in JACS and Science, because his previous findings that broke the ‘oxo wall’ were incorrect?
Hopefully these questions are exercising the old grey matter. Come back tomorrow for the answers and the next set of questions.
Source:
http://prospect.rsc.org/blogs/cw/2012/12/03/chemistry-world-christmas-quiz-day-1/
The other turtle dove must have flown
The answers to today’s quiz can be found here. Day 3′s quiz can be found here.
And on the second day of the Christmas quiz my true love brought to me… the answers to yesterday’s posers (see below).
But first, it’s time for today’s questions: Which giant of total synthesis announced in September that he would be joining Rice University next year?
Richard Gee and his team at the Lawrence Livermore National Laboratory, California, US, used molecular dynamics simulations to work out a way to decontaminate a deadly nerve gas, made famous by the Nicolas Cage film The Rock. What was the nerve agent ? Give yourself a bonus point if you know the chemical name of the compound!
And now the answers to yesterday’s brainteasers:
The molecule that resembles the Olympic rings was, of course, dubbed Olympicene. You can read our story about it here and read about the synthesis at Chemspider.
Craig Hill, an inorganic chemist at Emory University, was the researcher who asked for several of his papers to be retracted because he hadn’t actually broken the ‘oxo wall’ (the wall is a metaphor for the impossibility of forming terminal oxo bonds in elements in group 9 and beyond) as he first thought. You can read about the controversy here.
We’ll be back tomorrow with more questions.
Source:
http://prospect.rsc.org/blogs/cw/2012/12/04/chemistry-world-quiz-day-2/
It’s the kitchen acid everyone knows and loves. Find out about the hundreds of uses of vinegar – and the chemistry behind them - in this week’s Chemistry in its element
Source:
http://prospect.rsc.org/blogs/cw/2012/11/21/chemistry-in-its-element-vinegar/
The beer drank by ancient Nubians contained an antibiotic, which kept them healthy. Find out about the discovery of tetracyclines - antibiotics isolated from soil fungus - in this week’s Chemistry in its element
Source:
http://prospect.rsc.org/blogs/cw/2012/11/28/chemistry-in-its-element-tetracycline/
We forget today, in these days of the two cultures, just how close the arts and sciences once were. The era of the romantic poets, for example, was also an incredibly exciting time for chemistry, as new elements started to be discovered and explored. Humphrey Davy, for example, was not only a scientist, but a poet and an editor of Lyrical Ballads and many of the romantics looked to the clear language of the sciences to help them in defining the language for their new style.
Portrait of Sir Humphry Davy (1778-1829) by Sir Thomas Lawrence. Davy was the first person to isolate potassium and sodium
It’s from this period that the new exhibition at the Royal Society originates and gets its name. Although the displays begin with the discovery of phosphorus by Hennig Brand in 1669 the real explosion came in the hundred years from the mid-1700s.
From the society’s archives have come manuscript after manuscript claiming discovery of a new element, perhaps from samples brought back from an expedition in the Americas and for a time forgotten in the British Museum (niobium), or closer to home, first described as magnetic sand from Cornwall (titanium).
For anyone interested in the history of our discipline, getting to view so many important manuscripts and the stories behind them is a rare treat. Not only are there handwritten submissions to the Proceedings of the Royal Society, but also laboratory manifests, still using alchemical symbols in the 19th century, letters and even a pamphlet campaigning against Davy’s candidacy for president of the Royal Society.
Charles Hatchett’s element colombium, now called niobium, was found in a mineral sample sent to the Royal Society from America by John Winthrop FRS (1681-1747)
Also in in each cabinet are a variety of other artefacts relating to the scientists or discovery featured. The highlight for me were the palladium ingots entrusted to the society by the metal’s discoverer, William Hyde Wollaston, and used to supply the societies members with samples of this element, which at the time was even scarcer and more valuable than it is today.
Ultimately, this small but carefully chosen collection of artefacts charts the growing interest and excitement surrounding chemistry as the world began to open up to European explorers and scientists. For anyone already nearby, or perhaps in London for another reason, I would certainly recommend you take an hour out to perhaps acquaint yourself with some more of the names and works of the romantic chemists.
The exhibition is opens its doors on Monday 03 December 2012 and runs until Friday 14 June 2013 at the Royal Society, Carlton Terrace, London. It is free to visit and is open on Tuesdays from 2pm to 4pm and on Thursdays from 10am to 12pm. No appointment is necessary during those times.
Laura Howes
Source:
http://prospect.rsc.org/blogs/cw/2012/11/30/romantic-chemistry/
Herman on Valentines Day
Herman was created years ago .. on paper in chemistry class.. .. a class that the creator apparently had a LOT of procrastinate in... Herman has been brought back to life 20 or so yrs. later via digital world.. but sad to say he #39;s been long lost after someone stole him away... these are what is remaining/salvaged of a handful of shorts. .. enjoy. lolFrom:HermanTheWorm2011Views:1 0ratingsTime:00:25More inFilm Animation
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Herman on Valentines Day - Video
This is a first for us at Chemistry World – a rock song about chemistry. Many of you out there will readily recall Tom Lehrer’s elements song, where he puts the entire periodic table to music in under two minutes, but I can’t think of any rock that features chemistry. Whatever next? Slash in a lab coat?
Chemistry rock comes courtesy of Craig Graziano, a youth librarian from the US, and his band The Crypts! with his song about Marie Curie. In his catchy tune (shades of the Sex Pistols?), he sings about Curie’s discovery of polonium and radium, her Nobels and her untimely death caused by radiation exposure in the course of her work. I even learnt a couple of new things about this already very well-known public figure, including that she was a keen cyclist! The rest of the Discover Science album can be downloaded here.
Craig says that his song is more than just a bit of fun. It’s also about building interest and trust in science, which he says is on the wane in the US. Have a listen and let us know what you think: can you think of any other chemistry songs?
Patrick Walter
Source:
http://prospect.rsc.org/blogs/cw/2012/11/20/school-of-chemistry-rock/
Herman Goes Swimming
Herman was created years ago .. on paper in chemistry class.. .. a class that the creator apparently had a LOT of procrastinate in... Herman has been brought back to life 20 or so yrs. later via digital world.. but sad to say he #39;s been long lost after someone stole him away... these are what is remaining/salvaged of a handful of shorts. .. enjoy. lolFrom:HermanTheWorm2011Views:1 0ratingsTime:00:36More inFilm Animation
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Herman Goes Swimming - Video
The Adventures in Herman the Worm
Herman was created years ago .. on paper in chemistry class.. .. a class that the creator apparently had a LOT of procrastinate in... Herman has been brought back to life 20 or so yrs. later via digital world.. but sad to say he #39;s been long lost after someone stole him away... these are what is remaining/salvaged of a handful of shorts. .. enjoy. lolFrom:HermanTheWorm2011Views:2 0ratingsTime:00:25More inFilm Animation
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The Adventures in Herman the Worm - Video
Herman Sings
Herman was created years ago .. on paper in chemistry class.. .. a class that the creator apparently had a LOT of procrastinate in... Herman has been brought back to life 20 or so yrs. later via digital world.. but sad to say he #39;s been long lost after someone stole him away... these are what is remaining/salvaged of a handful of shorts. .. enjoy. lolFrom:HermanTheWorm2011Views:2 0ratingsTime:00:29More inFilm Animation
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Herman Sings - Video
Herman Buys a Balloon
Herman was created years ago .. on paper in chemistry class.. .. a class that the creator apparently had a LOT of procrastinate in... Herman has been brought back to life 20 or so yrs. later via digital world.. but sad to say he #39;s been long lost after someone stole him away... these are what is remaining/salvaged of a handful of shorts. .. enjoy. lolFrom:HermanTheWorm2011Views:1 0ratingsTime:00:20More inFilm Animation
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Herman Buys a Balloon - Video
Dry Ice Color Show: Video 1
This is a demonstration along with a brief description provided by my chemistry teacher. This demo is called Dry Ice Color show. This shows how pH levels of different indicators change as dry ice is added to them, therefore, explaining the color change. As dry ice is added, it becomes CO2, and thus makes a basic indicator more acidic.From:Kelly SanchezViews:1 0ratingsTime:01:57More inEducation
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Dry Ice Color Show: Video 1 - Video
Arrow - Oliver Helena - Here comes trouble
My first Oliver Helena video. I don #39;t really like Helena but, giving that she #39;s okay for a "bad guy" 🙂 and I must admit she and Oliver had a good chemistry on screen... I just hated the was she left... well, never mind. Hope you enjoy the video and if you do hit the like button... it #39;s free 😛 Watch in 1080 HD for best quality. Song: "Here comes trouble" by Honor SocietyFrom:kether12Views:1 0ratingsTime:01:54More inEntertainment
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Arrow - Oliver
Call Me Magnesium
My Honors Chemistry Project. To the tune of Call Me Maybe. Called Call Me Magnesium.From:pinky supViews:0 0ratingsTime:03:15More inMusic
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Call Me Magnesium - Video