tin

Tin is a chemical element with the symbol Sn (from Latin: stannum) and atomic number 50. Tin is a silvery metal that characteristically has a faint yellow hue.
Tin is soft enough to be cut with little force. When a bar of tin is bent, the so-called “tin cry” can be heard as a result of twinning in tin crystals; this trait is shared by indium, cadmium, zinc, and frozen mercury.
Pure tin after solidifying presents a mirror-like appearance similar to most metals. In most tin alloys (such as pewter) the metal solidifies with a dull gray color.
Tin is a post-transition metal in group 14 of the periodic table of elements. It is obtained chiefly from the mineral cassiterite, which contains stannic oxide, SnO2. Tin shows a chemical similarity to both of its neighbors in group 14, germanium and lead, and has two main oxidation states, +2 and the slightly more stable +4. Tin is the 49th most abundant element on Earth and has, with 10 stable isotopes, the largest number of stable isotopes in the periodic table, thanks to its magic number of protons.
It has two main allotropes: at room temperature, the stable allotrope is β-tin, a silvery-white, malleable metal; at low temperatures it is less dense grey α-tin, which has the diamond cubic structure. Metallic tin does not easily oxidize in air and water.
The first tin alloy used on a large scale was bronze, made of 1⁄8 tin and 7⁄8 copper, from as early as 3000 BC. After 600 BC, pure metallic tin was produced. Pewter, which is an alloy of 85–90% tin with the remainder commonly consisting of copper, antimony, and lead, was used for flatware from the Bronze Age until the 20th century. In modern times, tin is used in many alloys, most notably tin / lead soft solders, which are typically 60% or more tin, and in the manufacture of transparent, electrically conducting films of indium tin oxide in optoelectronic applications. Another large application is corrosion-resistant tin plating of steel. Because of the low toxicity of inorganic tin, tin-plated steel is widely used for food packaging as tin cans. Some organotin compounds can be extremely toxic.

View More On Wikipedia.org
Recent contents
  1. S

    TIN Number kutoonekana kwenye Recruitment portal ya TRA

    Habari Wadau, Nakutana na changamoto ya usajili wa TIN number kwenye recruitment portal ya TRA, ambapo kila nikijaribu kuingiza number husika za TIN na kuzi-save, mfumo unaleta msg kwamba zimekuwa saved successfuly, lakini baada ya muda sehemu ya TIN yenye asterisk inabaki wazi tena. Je, kwa...

  2. TRA: Ukitoka kuagiza gari kutoka nje (Mfano Japan), lazima uwe na TIN number

    Naona utaratibu unazidi kubadirika. Kuanzia tar 20 Jan, 2025 unavoagiza gari kutoka nje ya Tanzania, lazima utume na TIN number, sio kama zamani ulikua unaitumia wakati wa kutoa gari. Admin kutoka Mapato TRA Tanzania njoo ufafanue.

  3. Je, Tundu Lissu ashitukia biashara za Freeman Mbowe? Ahoji biashara gani haina TIN Number?

    Wakuu, Tundu Lissu alipofika Uwanja wa ndege, amehoji chanzo cha fedha kwa baadhi ya watu. Tundu Lissu amesema, "Ni muhimu tukajua, katika Mazingira ya Tanzania halisi hii, haya Mamilioni haya yanatokea wapi na ni salama kiasi gani? Kama mtu ana biashara Nchini au Nje ya Nchi, kuna biashara...
    • figganigga
    • Thread
    • ahoji biashara freeman mbowe gani lissu mbowe number tin tin number tundu tundu lissu
    • Replies: 157
    • Forum: Jukwaa la Siasa

  4. Umuhimu wa namba ya TIN Kwenye Shopping

    Wakuu, Kila mara ninapolipia bidhaa toka hizi supermarkets, napewa option ya kujaza nambari yangu ya mlipa kodi, maarufu kama TIN number kwenye receipts. Swali: Je, kuna faida yoyote direct/indirectly ninaweza kupata nikianza kuijaza?

  5. Naangaliaje TIN yangu online??

    Nimeingia kwene TRA online siiioni ! Wenye uzoefu nisaidieni

  6. Jinsi ya kuongeza jina la biashara kwenye TIN number

    Habari wakuu, Nimeenda Voda shop kusajili LIPA number yenye jina la biashara nikiwa na leseni yenye jina la biashara na TIN yangu ya biashara. Nikaelezwa ili nisajili LIPA namba ya namna hiyo inatakiwa nipate TIN number yenye jina la Biashara. Je kuna mwenye uzoefu aliyewahi kuongezea jina la...

  7. Kuna sababu gani huwezi pata TIN number mpaka ufike miaka 18?

    TIN number ni muhimu na bado sijaona sababu yoyote ya mpaka ufike 18. Wataalamu naomba sababu kwanini mpaka 18 years ndio upate.

  8. Naombeni msaada wa kubadili TIN number ya kawaida kuwa ya biashara

    Habari wakuu, naombeni msaada, nahitaji kubadilisha TIN number ya kawaida kuwa ya biashara online, kwa aijili ya chombo cha moto aka bajaj, sasa huku online naona mapichapicha tu nimefika level ya business location sasa hapo mtihani. au sio lazima kujaza vipengele vyote?
  9. L

    Naomba utaratibu wakubadili tin number kutoka non businesses kwenda business

    Samahani nilikua naomba kazi kampuni x vigezo vikawa tin number nikampa mtu anitengenezee yeye akatengeneza ya non businesses Sasa imekataliwa nafanyaje kubadili msaada jaman
  10. P

    Naombeni maelekezo jinsi ya kupata TIN na leseni ili nikasajilie lain za uwakala

    Nahitaji kusajili laini za UWAKALA hivyo nilikua na omba maelekezo wapendwa naanzia wapi ? Mpaka nipate Tin,lesen pamoja na laini Je kuvipata vyote hivyo inaweza chukua gharama kiasi gani.? Laini ya Vodacom,Tigo, Airtel na halotel

  11. Kupata Tin number na tax clearance kwa kampuni

    Naomba kuuliza Wiki iliyopita huku nyanda za kaskazini nilienda TRA kwa ajili ya kupata TIN number na tax clearance ya kampuni, baada ya kulipa rental tax na stamp duty nikaambiwa nitafute muhasibu aniandalie provisonal return statement ndo nitapata tin number pamoja na tax clearance. Au nimpe...
  12. J

    Nina TIN Number ambayo sijawahi kuitumia kwa biashara yoyote zaidi ya kupatia leseni ya udereva, Je Tax Clearance nitadaiwa?

    Kama heading inavyojieleza, Tangu nipate TIN Number, Haijawahi kutumika kwa biashara isipokuwa tu ilitumika kipindi nahitaji leseni ya udereva, Je TIN hiyo naweza kuitumia kufungulia biashara sasa? Je katika kupata Tax Clearance kutakuwa na complications zozote? Nawasilisha.

  13. TRA: Usajili wa TIN kwa mwananchi umri kuanzia miaka 18 siyo kwa ajili ya biashara bali ni kwa utambuzi

    Mamlaka ya Mapato Tanzania (TRA) imesema hadi kufikia Desemba 31, mwaka huu kila mtu mzima nchini anatakiwa kuwa na Namba ya Mlipa Kodi (TIN). Hayo yameelezwa na Ofisa Mkuu wa Usimamizi wa Kodi (TRA), Hamadi Mteri wakati wa ufunguzi wa semina kwa wanachama wa Klabu ya Waandishi wa Habari Mkoa...

  14. Utaratibu wa kuhamisha TIN number kutoka mkoa mmoja hadi mwingine

    Habarini wakuu, kama uzi unavyojieleza naomba kujua utaratibu wa kuhamisha Tin number ya biashara kutoka mkoa mmoja kwenda mwingine, natanguliza shukrani

  15. Mtu yeyote mwenye umri wa miaka 18 na kuendelea anapaswa kuomba TIN

  16. Je, kupewa TIN ni sawa na kodi ya kichwa?

    Waziri wa Fedha na Mipango amependekeza kugawa TIN kwa watu wa kuanzia miaka 18 na kuendelea, na taarifa hizi ziende sawa na NIDA ili kulipa kodi kwa usahihi. Baadhi ya watu wamehusianisha namna hii ya ukusanyaji kodi na Kodi ya kichwa, kitu ambacho naona ni kupotosha ukweli kuhusu kodi ya...

  17. Jinsi ya kupata TIN NUMBER ONLINE

    Wakuu habari, Kuna mtu anaitaji TIN ya TRA , Je! anaweza kuipata ONLINE wakuu?! Kwa namna zipi

  18. Msaada mwepesi na waharaka wa kubadili TIN namba isiyokuwa ya kibiashara kwenda ya kibiashara

    Naona Staff wa TRA wa uku nilipo siwaelewi kabisa,wanafanya mambo yawe magumu... Mwaka 2017 nikiwa Dar es salaam nilipata TIN namba lakini ilikuwa si kwa ajiri ya biashara (non business use),niliipata nkiwa ktk harakati za mafunzo ya udereva. Kwa sasa nipo mkoa wa nyanda za juu uku ktk...

  19. Kusajili TIN online bado ipo?

    Nawauliza TRA, ile huduma yenu ya kusajili TIN number online bado ipo?. Siku ya tatu leo nimesajili TIN online lakini bado naambiwa ombi linashughulikiwa. Kipindi kile mmeanzisha hii huduma ilikuwa ndani ya masaa kadhaa unapata TIN number yako. Kwenye tovuti yenu kuna number ya whatsapp...
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…