Duniya Do Hisson Mein Bati Hai ⚖️
Aapke aas-paas ki har cheez kisi na kisi element (tatva) se bani hai — aur lagbhag saare element do bade khemon mein aate hain: metal (dhaatu) aur non-metal (adhaatu). Chamakti, kadi, taar banne wali cheezein metal hain; aur bhurbhuri, madham, bijli na chalane wali cheezein non-metal.
📌 Aaj tak gyaat ~118 elements mein se lagbhag 90+ metals hain aur sirf ~22 non-metals. Yani duniya mein metals hi zyada hain!
✨ Metals Ke 7 Khaas Gun
| Gun | Matlab | Udaharan |
|---|---|---|
| Metallic lustre (chamak) | Ragadne par chamakte hain | Sona, chandi, naya kata hua sodium |
| Malleability (aaghaatvardhaniyata) | Peet kar patli chaadar bana sakte hain | Sona, chandi, aluminium (foil) |
| Ductility (tanyata) | Kheench kar taar bana sakte hain | Sona, tamba (copper wire) |
| Conductivity | Bijli aur garmi achhi tarah le jaate hain | Chandi > tamba > aluminium |
| Sonorous (dhwanik) | Bajane par "tan-tan" aawaz | Ghanti, thali |
| Hardness | Aksar kade hote hain | Loha, chromium |
| High M.P./B.P. | Bahut zyada taapmaan par pighalte hain | Loha 1538°C, tungsten 3422°C |
Sona duniya ka sabse malleable aur ductile metal hai! Sirf 1 gram sone ko peet kar 1 square metre ki chaadar banayi ja sakti hai — itni patli ki uske aar-paar dikhe. Aur usi 1 gram se lagbhag 2 kilometre lambi taar kheenchi ja sakti hai! Isiliye mandiron aur kitaabon par sone ka warq (gold leaf) chadhaya jaata hai — bahut kam sone mein bahut zyada area.
🪨 Non-metals Ke Gun
| Gun | Non-metal ka vyavhaar |
|---|---|
| Chamak | Nahi hoti (madham/dull) — chhod kar iodine aur graphite |
| Malleable / ductile | Nahi — thos non-metals bhurbhuri (brittle) hoti hain, toot jaati hain |
| Bijli ka sanchalan | Nahi karte — chhod kar graphite |
| Sonorous | Nahi |
| Halat (state) | Thos, drav ya gas — teenon ho sakte hain |
| Melting point | Aksar kam |
⚠️ Apwaad (Exceptions) — Board Ka Favourite!
Har niyam ke apwaad hote hain, aur board exam mein yahi poocha jaata hai:
🔸 Mercury (Hg) — ek metal, par kamre ke taapmaan par drav (liquid)!
🔸 Bromine (Br) — ek non-metal, par drav!
🔸 Sodium (Na) aur Potassium (K) — metals, par itni naram ki
chaaku se kat jaati hain!
🔸 Graphite — ek non-metal, par bijli conduct karta hai aur chamakta
hai!
🔸 Iodine — ek non-metal, par chamakdaar (lustrous) hai!
🔸 Diamond — carbon (non-metal) ka roop, par duniya ka sabse kada
padarth!
Aapki pencil ka "lead" (graphite) aur duniya ka sabse mehnga heera (diamond) — dono sirf carbon se bane hain! Farak kya hai? Sirf atoms ki goothbandhi. Diamond mein har carbon 4 doosre carbons se majbooti se juda hai — isliye wo itna kada hai. Graphite mein carbon parton (layers) mein hai jo ek doosre par phisal jaati hain — isliye wo kagaz par nishaan chhod deta hai aur naram lagta hai. Ek hi element, do bilkul alag duniyaein!
⚠️ Sodium aur potassium ko hamesha mitti ke tel (kerosene) mein dubokar rakha jaata hai. Kyun? Kyunki ye hawa ke sampark mein aate hi itni tezi se react karte hain ki aag lag jaati hai. Inhe kabhi nange haath mat chhuna.
Bharat sadiyon se metal-vidya (metallurgy) mein aage raha hai. Wootz steel — jo dakshin Bharat mein banta tha — duniya bhar mein mashhoor tha aur usi se mashhoor "Damascus" talwarein banti thi, jo itni majboot aur dhaardaar hoti thi ki Europe ke lohaar hairaan reh jaate the. Ye Bharat ki 2000 saal purani engineering thi.
🧠 Apne Aap Ko Test Karo
🎯 Sorter game khelo — property dekho aur pehchaano metal hai ya non-metal!
Play Property Sorter →