I kwabantu of phambili

Ukuhola - metal ehlukile has a lot of izimfanelo emihle nemibi, kwaphela iminyaka eminingi abantu baye bafunda kukhishwe hhayi kuphela eziyingozi, kodwa bayazuza nalapho izakhiwo physicochemical we ketshezi. Manje enjalo isici, ezifana phambili, ungaphakathi ishadi lesikhathi olunezinombolo 82, ubizwa ngokuthi PB ibizwa ngokuthi "Plumbum". He is grey, kwabantu phambili - 11,34g / cm3, ingenye insimbi ekhethekile nethambile. Kodwa musa udidekile phakathi le miqondo emibili ngokwesayensi. I kwabantu kwezinga lomthofu Ngamanye amazwi - kuyinto isisindo saso esikhethekile iyunithi ivolumu ngalinye, futhi umsungulo isakhiwo kubangelwa crystal ngehele. Ukuhola kuyinto elithambile kuphela ngesimo okuhlanzekile, kodwa lapho ngaphansi ukufudumeza ukwelashwa ngaphansi kwezimo lokushisa ethile, kungaba metal ngokwanele isikhathi eside.

Umsuka igama "Hola" buphikisana kakhulu, ngezilimi eziningi, kuzwakala sengathi "tin 'akumangalisi, ngoba phambili kufana ithini labavulekela kamuva kakhulu bamshiya igama lakhe okwamanje, kodwa igama ketshezi umbuzo ishintshile. Lezi izinsimbi ezimbili iyafana komunye nomunye zibukeke hhayi kuphela, kodwa futhi ezinye izakhiwo, nakuba kwabantu phambili kuba kunalelo ukuminyana tin.

On phambili futhi impahla yayo abantu wazi ngaphezu 7 ayizinkulungwane. Iminyaka BC futhi kungenzeka kwaba ingozi, ngoba metal has a ukuncibilika lokushisa eliphansi -327 C. Ibe umuntu icala lapho ngenxa yomlilo ihlathi, ingozi, ngaphansi umlotha izihlahla ingots phambili atholakele. Ngakho, sathola ezifakwa egcwele yaleli metal eMelika. Sokuncibilikisa Lead yaqale eyaziwa izinqubo Metallurgical ukuthi kuhilelani okwenza sebuningini izinto. Ngokwesibonelo, eRoma yasendulo, kusukela phambili ukwenza izitsha, ukungezwa izimonyo, sekwenziwe ngisho amanzi, esizwa kwabantu eliphezulu lomthofu futhi ikhono lokubekezelela imiphumela emibi lesi metal kusukela ezungezile. Abantu ke abazange bazi ukuthi zonke compounds encibilikayo we metal zinobuthi kakhulu.

Kamuva, abanye abantu abasebenzisa ekuholeni inqubo sokuhlushwa futhi ekugcineni yasungulwa esinye sezikhali zinobuthi kakhulu - inhlamvu. Yiqiniso, ngosizo phambili isetjentiswe okuningi umonakalo ezinsukwini ubudala, kodwa metal uqobo ngoba abantu abangenacala yikho okwabangela lokhu. Manje kusikhathi sethu lesichubekako, siye safunda ukuba sizuze kakhulu kusukela izakhiwo phambili, njengoba kwabantu bayo isihlobo udlala kwezinye izindawo indima ebalulekile. Cishe ingxenye eyodwa kwezintathu ukukhiqizwa Imininingwane yalolu ketshezi isetshenziswa ukwenza amabhethri izimoto ezivamile. Futhi lokhu metal isetshenziswa embonini kaphethiloli, yengezwe uphethiloli ukuthuthukisa izimfanelo zayo. Njengoba sinalezi leminyaka isiminyaminya kanye izimoto cishe ngaso sonke, bese usebenzisa, bese ukuhwamuka of umthofu kuphethiloli umusi emkhathini kubangela umonakalo omkhulu emvelweni. Uma namanje acabangele ukuhwamuka-asphalt kule sizini hot, lapho inhlanganiso ibitume incipha nge okwandisa izinga lokushisa, asikwazanga nazo i Inhlekelele yezindawo zemvelo. Kodwa lo muntu okufanele asolwe ngokwakhe!

Cabanga nje, ngonyaka emkhathini ezingaphezu kuka-50 eziyinkulungwane. Amathani intuthu phambili. Namanje isetshenziswa ukuze umkhakha Ceramic ekukhiqizeni crystal, futhi ubani ongakaze ezwe Ukuhola White? Le nto itholakala imibala eminingi, okuyinto, ngokukhethekile, asetshenziswa ekubhaleni imifanekiso. Ngokuhamba kwesikhathi, abantu baye bafunda hhayi kuphela ukuze bazivikele insimbi ukuvikela nokulisebenzisa. Ngokwesibonelo, ngenxa Ukwakheka ezithile baye bafunda amaphilisi ezinhlungu nezidakamizwa eqeda ukuvuvukala. Futhi omunye izici ezibaluleke lokhu metal kuyinto yayo "opacity" X-ray kanye imisebe enemisebe ukuthi isetshenziswa amakamelo-X-ray kanye nemishini embonini zenuzi.

Ekuphetheni, singasho ukuthi iyiphi isici chemical inezici yayo emihle nemibi, kodwa azoyisebenzisa, ukuzixazulula kuphela indoda, futhi kukuhle uma esebenzisa ulwazi lwakhe ukuze ezinhle kanjani kithi sonke!