တို႔ရဲ႕ တျခား sourcesေတြက ဘာေတြလဲ။ Other sources of sodium and potassium are soda feldspar, Na
2
O.Al
2
O
6SiO
2
, sodium carnonate, Chlile saltpetre (sodium nitrate), potassium carbonate and potassium nitrate. 3. Sodiumကို ဘာနည္းနဲ႔ extractလုပ္သလဲ။ Sodium is extracted by the electrolysis of fused sodium chloride. 4. Sodium ဟာ မာသလား။ ေပ်ာ့သလား။ Sodium is a soft metal and may be cut easily with a knife. 5. Sodiumဟာ ဘယ္လိုအေရာင္ရွိသလဲ။ Sodium has a silvery lustre but it rapidly tarnishes in moist air. 6. Sodiumဟာ အပူနဲ႔လွ်ပ္စစ္စီးကူးႏိုင္ပါသလား။ Sodium is a good conductor of heat and electricity. 7. Sodium ေလမွာ ေလာင္ကၽြမ္းရင္ ဘာရသလဲ။ Sodium burns in oxygen to give sodium peroxide (Na
2
O
2
). 8. Sodium ဟာ mercury မွာ ေပ်ာ္ဝင္ေနရင္ ဘာျဖစ္သြားသလဲ။ Sodium dissolves in mercury to form sodium amalgam. 9. Sodiumကို ဘာအေျမာက္အမ်ားထုတ္လုပ္ရာမွာ သံုးသလဲ။ Sodium is used in large quantities of the manufacture of sodium peroxide (Na
2
O
2
), sodium cyanide (NaCN) and sodamide (NaNH
2
). It is also used in the manufacture of tetraethyl lead, an anti-knock additive used in petrol. 10. Sodium chlorideကို ဘယ္ေနရာေတြမွာ သဘာဝအတိုင္းေတြ႕ရပါသလဲ။ Sodium chloride occurs in nature as rock salt and in sea water. 11. Sodium chlorideကို ဘယ္ေနရာေတြမွာ သံုးသလဲ။ Sodium chloride is used for the seasoning of foods. 12. အသက္ရွဴကိရိယာမွာ ဘယ္ျဒပ္ေပါင္းသံုးကို သံုးသလဲ။ Sodium peroxide (Na
2
