सीज़ियम
siziyam (aangrezi: Caesium) elkali samooh ka dhatu hai. siziyam ka sanket Cs, paramanu sankhya 55, paramanu bhar 132.81 hai. siziyam ka avishkar bunasen dvara 1830 ee. mean hua tha. isake varnapat mean unhoanne do chamakili nili rekhaean dekhi thian. grik shabd sijiyam ka arth hai asmani nila, isi se isaka nam siziyam rakha gaya. siziyam ka pramukh khanij polusait hai. yah ailuminiyam aur siziyam ka siliket hai. isamean siziyam aauksaid 31 se 37 pratishat rahata hai.
polusait par haidroklorik ya naitrik aml ki kriya se siziyam ghul jata hai. vilayan mean aiantimani kloraid ke dalane se aviley yugm kloraid ke avakshep prapt hote haian. any anek khanijoan jaise lepidolait, lyoosait, paitatait, traiphilin aur karnelait mean bhi siziyam paya gaya hai. khanijoan se siziyam ka prithakkaran kathin aur vyayasadhy hai. lepidolait se lithiyam nikal lene par roobidiyam aur siziyam baj jate haian. unako yugm platinik kloraid banakar usake prabhajak kristalan se ye prithakh kie jate haian. siziyam kloraid ko kailsiyam dhatu ke sath asavan se siziyam dhatu prapt hoti hai. dhatu chaandi si saphed hoti hai, vayu mean jalati hai aur pani se jald akraant hoti hai.
dhatu 26°-27° sean. par pighalati aur 690° sean. par ubalati hai. isaka vishisht gurutv 15° sean. par 1.88 hai. isake haidraksaid, kloraid, bromaid, ayodaid aur potaishiyam lavanoan ke sadrish hote haian. isake salphet, naitret, karbonet aur ailam bhi prapt hue haian. yah ek sanyojak lavan banata hai. isake varnapat mean do chamakili nili rekhaoan se isaki pahachan saralata se hoti hai. nili rekhaoan ke atirikt tin hari, do pili aur do narangi rang ki rekhaean bhi paee jati haian. rediyo nali ya valv evan prakash vidyut seloan ke nirman mean isaka mahattvapoorn upayog hai.
|
|
|
|
|
|
tika tippani aur sandarbh
sanbandhit lekh
| avart sarani | |||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H | He | ||||||||||||||||||||||||||||||||||||||||
| Li | Be | B | C | N | O | F | Ne | ||||||||||||||||||||||||||||||||||
| Na | Mg | Al | Si | P | S | Cl | Ar | ||||||||||||||||||||||||||||||||||
| K | Ca | Sc | Ti | V | Cr | Mn | Fe | Co | Ni | Cu | Zn | Ga | Ge | As | Se | Br | Kr | ||||||||||||||||||||||||
| Rb | Sr | Y | Zr | Nb | Mo | Tc | Ru | Rh | Pd | Ag | Cd | In | Sn | Sb | Te | I | Xe | ||||||||||||||||||||||||
| Cs | Ba | La | Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | Hf | Ta | W | Re | Os | Ir | Pt | Au | Hg | Tl | Pb | Bi | Po | At | Rn | ||||||||||
| Fr | Ra | Ac | Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Uut | Uuq | Uup | Lv | Uus | Uuo | ||||||||||
| |||||||||||||||||||||||||||||||||||||||||