Ciao!
I'm Aldo Bonincontro, I'm 44 and was born in Genoa, Italy,
My father was an engineer, but he died when I was 15, letting me and my mother (housewife) in a difficult economic situation.
Despite this situation, I could graduate in Chemistry in Genoa in 1990.
Then, I started working for the last 2 years in a private oil products chemical laboratory, after the military service but, then, this was closed at the end of 1993 and I lost my job.
Then, I could find only short and not good jobs in my field, until 1995. After that year, I couldn't find anymore a job in Chemistry despite all the possible endeavours I made, also abroad.
I could live only making the mail courier for a little private company and giving private lessons, but in the meantime, also the relations with my mother were more and more deteriorating, given that I was obliged to live in her house.
Just the case when a house is not a HOME!
Eventually, in the late 2001, I won a public concourse for a chemical analyst place in the laboratories of the Italian Customs Agency in Savona, a harbour town of 50,000 inhabitants 45 Km far from Genoa.
So, I started working and living there (since June 2001) as I do today.

I'm single, never married and I live alone in Savona.
I love nature and animals and I've always given my help to environmentalist and animalist groups.
Also for these reasons, I'm vegetarian, not eating meat, fish and products containing them and I also avoid successfully leather clothes and shoes.
I don't smoke, I don't follow the last fashion in dressing and I don' t use a cell phone because "ALLERGIC" to it.
In a Country like Italy where nearly everybody is crazy for cellular phones it's strange, but I feel very fine without it.
In the good and in the evil, I'm used to have not conventional positions and ideas, but I'm reserved, not liking to stay on the front-line.
I like science and technology provided that they really solve humans' problems, but this not always happens.
I'm also very interested in arts, history, sciences, politics, photography, stamps and crystals and I draw rather well.
I'm not a practicing Catholic and I'm very anticlerical.
I love make trekking and travel, when I can.
I know rather well English, French and Spanish, largely, by self-learning, work and holidays practice.

Thank you for your patience in reading these lines!

Sciences > Chemistry The chemical properties of Tin

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TIN (Sn) - CHEMICAL-PHYSICAL PROPERTIES

- Atomic number: 50
- Atomic weight: 118.69
- Electronic configuration: [Kr]4d10 s2 p2
- Atomic radius (nm): 0.140
- 1st ionization potential (eV): 7.34
- 2nd " " : 14.5
- 3rd " " : 30.5
- 4th " " : 31.4
- Electrode Standard Potential (V): -0.136 (Sn++/Sn); 0.15 (Sn++++/Sn++)
- Electro-negativity (Pauling scale): 1.8
- Density (g/cc): 7.28
- Melting point (C): 231.97
- Boiling point (C): 2270
- Oxidation numbers: +2; +4

PRESENCE IN NATURE AND PRODUCTION
Sn belongs ...

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