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lead in candle wicks

I have noticed lately that a lot of candle makers are advertising that their wicks are lead free. Is there a lot of lead in old candles, and does it pose any real risk, or is this just another...

barbie jacey

compounds

any chemists that could help me here? what is the scientific name for a compound that is sometimes called "greenium" for school purposes. It turns black when heated, and loosed around 2g of its...

Law Student

Football and Photosynthesis

One for the botanists: Most football stadia are used so regularly that the pitches are marked out continuously from September to May. As the whitewash used must reflect almost almost all of the...

bunny29

fingernail growth

How exactly do fingernails grow? I know they grow from the base, so do they attach and detach as they move up the finger?

demitry-hed

Arsenic again

what group is arsenic in, im guessin Pnictogen?

Rosie2

Can caustic soda used in soap making, harm skin

I would like to make my own natural soap, but when I saw the ingredients needed I was alarmed to see caustic soda played a big part in the making of soap. Can this be harmful to the skin, especially...

warewolf24

dandylions

do dandylions make you wet the bed? if so how?

Munkeh

Renal failure

Why do some people go into respiratory failure as a cause of acute renal failure happening?

djab911

Cupronickel

Can anyone please tell me if cupronickel is a soft or hard metal ?

MustangLady

Bloody Transfusions and DNA

Ok, we all know that DNA is unique to each individual. Say for instance someone needed a blood transfusion, would they then have the DNA of the person the blood came from? Or if there is a mixed blood...

cleversod

why after washing up.

why after washing up in a bowel and you empty the water out there is always a tea spoon at the bottom of the bowel?

celeste_t

dna

How long would one strand of DNA be if stretched out in a straight line?

kujawski

Patrick Moores eye

How did Sir Patrick Moore get a dodgy eye, some time ago i heard it was from his childhood whilst looking at the sun through his telescope.Is this the case or not.

cunwin

precious metals

what are the precious metals

EDDIE51

Tube bombers, Hydrogen Peroxide Reaction?

Any one else a bit curious about the composition of the explosive that the tube bombers have been reported to use? I have worked using concentrated Hydrogen Peroxide ,100 vol, to decompose organic...

Rascalnet

Emitting blue light when using high pressure water jet.

I work making on a chemical plant making Emulsion Polymers and whilst recently inside, cleaning the walls of a "dirty" Reactor with high pressure water (>10000 PSI) I experienced a blue light where...

Dee-M-See

Mobile Phones

I have been told if you place your mobile phone in the microwave then ring the number if it rings your microwave is leaking .Is this true or a hoax?

buggernuts

organic radium

Round about 1914, a Mrs Maud Dickinson who lived in Brighton, discovered some crystals which seemed to have the same or at least similar properties to radium. This she called "Radioleum" or "organic...

Yuay

Creating Twins

Ok, i am trying to create twin versions of myself. how would i go about doing it? i mean is there a formula at home? thing? or just what can i do? i need to know.

claret1

human temperature

Maybe I heard an answer on QI but are there certain reasons behind why the human temperature evolved to be around 98.6.

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