From Wikipedia, the free encyclopedia
Chemical element uu chij hae jon ki khaali el rakam ke atom se banaa hae. Atom proton, neutron aur electron se banaa hae. Ek atom me jetnaa proton hae ke atomic number bolaa jaae hae. Jaise ki koi atom jisme 6 proton hae, rasaenik element carbon hae aur sab atom jisme 92 proton hae, uranium ke atom hae.
Ek element ke sab atom me ekke ginti ke neutron nai rahe ke jaruri hae. Ek element ke atom ke jab ekke ginti ke neutron nai rahe hae tab iske isotope bolaa jaae hae.
Sab chij element se bane hae. Jab ek chij me ek rakam se jaada atom hae tab iske compound, nai to mixture bola jaae hae. Ek compound ke sab se chhota bhaag ke molecule bola jaae hae.
Rasanik vigyan (Chemistry) me 118 rasenik element ke jaan ajjae hae, jisme se 92 ke nature me paawa jaae hae, aur baaki ke laboratory me banaawa gais hae. Insaan ke dehin me 26 element hae.[1]
Rasaenik element ke periodic table me dekhaawa jaae hae, jisse ek element ke property ke duusra se compare karaa jaae sake hae.
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