MulderMan

the inner rod of an alkaline cell is Zinc (atualy it`s Zinc plated brass) the paste is KOH' date=' so don`t get any on your hands for too long, it`ll take your skin off and you won`t even feel it!

the cell case is ordinary steel (try the magnet test).

 

the inhalation of most chemicals can be dangerous, MnO2 is no exception.[/quote']

 

 

is that all the black powder that the carbon electrodes are contained in? always wondered what that is, doesnt half make a mess when your trying to get the carbon out!

same for me really, you can get the occasional good lot on ebay in england, but for the rest its europe and the stated. and also some element sites and ebay sellers dont want to go international for some elements!

I`m with Ecoli 100% on this one.

 

it`s the bacterial action that accelerates decomposition' date=' nuking them would be counter productive.

 

think about how certain foods are irradiated with Cobalt 60 and Why it`s done.

it kills off any bacteria that assists the breakdown, and thus giving the food an indefinate shelf life.[/quote']

 

you know i would have never thought of that, they do it to strawberries dont they? thats what i heard.

 

you could always do an emperiment on the factors affecting the rate of decay, or something like that.

ill look into that then. where do you get your vials? ive just been using the ones that my elements have came in and some that i keep insects in for microscope things.

orally the LD50 is 2500 mg per kilo. but IV its just over 100 mg per kilo

well ebay seems to be my best freind for elements right now. does anyone have the foil samples of metals such as gold that ive seen around? im not exactly rich but would still like nice samples of the elements.

its used to prevent and treat conditions such as hypokalemia (typo?), the K+ ion is used in nerve condustion, kidneys and muscle contractions, fertiliser, lo-salt. thats what i can think of off the top of my head. potassium is vital in our bodies and using KCl is the usual way to replenish it, as it contains the k+ ion.

i think you might be on about potassium chlorATE (KClO3) that is a good oxidiser and used in explosives and fireworks.

i would have thought that radioisotopes would only have an affect on living cells. wouldnt some of the radioisotopes that you will plan with, pollute the enviroment also?

about how much of you guys have spent on elements so far?

In high school advanced biology' date=' we had to dissect a cat. We had lab exams, and I had to take it home with me on the bus so I could study it. No one would sit with me - then, when I got it home, mom wouldn't allow it in the house, so I was outside on the porch in the dead of winter. (Paid off - I got an "A").

 

When I took biology, we also had to "pith" a frog for a live dissection. I dislike killing things, so reluctantly, the bio prof agreed to do it for me. It hopped out of his hands and took off across the floor, to my squeals of "Go, froggy, Go!" It squeezed in behind a built in lab cabinet from whence it could not be dislodged. The prof looked at me and said, "that thing's going to die in here and stink up the whole class."

 

I saw him a few months ago and he still remembers the episode, we both got a good laugh from it.[/quote']

 

 

Reminds me of E.T eh?!

Thought this would be a good time to bring this thread back from the dead. Today i start my element collection! A parcel just arrived with:

Mercury

Tantalum

Antimony

Bismuth

Chronium

Tungsten

Ytterbium

Calcium

Germanium

Zinc

Magnesium

Manganese

will post pics later. hows everyone getting along with there collection aswell?

did you figure out the difference?

yea i think so, one atom gives up an electron to another, making an electrical force to hold them togeather. its just the point of teachers ignorance.

ill look into that thanks. i like the more advanced stuff anyway, most of the things in school is common sense. alot of science teachers that i know dont want to promote science or cant be bothered. last week i asked about how do ionic bonds fuction in comparison to covalent. and i got the reply that i dont need to know for your exam that so i wont explain it. most teachers think everyone hates science and its a painful experience, that annoys me immensly also!

the thing that annoys me is that im 15 and havent even learnt a thing in school about chemical bonds. and these people come here asking for work to be done that they have supposedly learnt.

im not sure if they actually feed on the urea or not, it could just be there as a product of sweat. its a good guess that they would feed on the salts but it always helps to have general nutrients in with cultures.

sorry! just like a reflex! i think next time ill just make up answer, or is that not allowed .

well seen as though copper is above silver in the reactivity series:

silver chloride + copper --> copper chloride + silver.

not hard at all, you could atleast make it look like your genuinely asking for help.

presuming youve learnt about this in school why on earth dont you have an example? lots of compounds are joined covalently. at an atomic level a covalent bond is one in which two atoms share one or more valence electrons. its not that hard, a read through your notes or the internet only takes a second.

ive only done a heart, but it wasnt really well explained, more of an excuse for the class to cut things up.

How is hydrochloric acid produced in your stomach? Ive always wondered this.

agar is just a jelling medium that nutrients are contained in, and bacteria can grow on.

Name

Street Name

Area

Town

County

Post Code

i could of proberly worked it out if i written it down right, its just i didnt know what some things were

thanks, atleast now i can make out an address and phone number. just got abit confused with the american system.

thanks blike, oh and can you post the format of telephone numbers please also.

thanks

I lost contact with an old freind when they moved to America a few years back and lost my address book with details. Anyway found a bit of paper with the details today and wondered if someone in america could help me decipher the details it a bit better and put them into propper address format. Its in tulsa btw.

Thanks.