important facts of liquid nitrogen

Lithium is the hardest of all the alkali metals. The melting and boiling points of lithium are much higher than those of other elements of Group 1. Lithium is less reactive as compared to other metals and it does not get tarnished readily in air. It forms only monoxide, Li 2 O ..

1) They produce food for all organisms 2) They provide beneficial substances like drugs, tannins, fibres, rubber, vegetable oils, fuel, condiments. 3) Some plants contain alkaloids which check growth of cancer cells. Example: Rosy periwinkle. 4) Plants release O 2 , cool enviro..

oxide Molecular formula Oxide Molecular formula Sodium oxide Na 2 O Iron(II) oxide FeO Potassium oxide K 2 O Iron(II)oxide Fe 2 O 3 Calcium oxide CaO Lead(II)oxide PbO Magnesium oxide MgO Lead(4)oxide PbO 2 Aluminum..

Acid Molecular Formula Hydrochloric acid HCl Nitric acid HNO 3 Sulphuric acid H 2 SO 4 Phosphoric acid H 3 PO 4 Acetic acid CH 3 COOH Carbonic acid H 2 CO 3 Sulphurous acid H 2 SO 3 Nitrous acid HNO 2h..

Group 15 of the Periodic table includes five elements namely nitrogen (N), phosphorus (P), arsenic (As) antimony (Sb) and bismuth (Bi). This group is regarded as nitrogen family. There is a transition from non-metallic to metallic character as we go down the grou..

Identify the addition fact for the multiplication fact. 3 × 2 = __________________ => 3 + 3 + 3 + 3 + 3 or 2 + 2 + 2 or 3 + 3 + 3 or 2 + 2..

Identify the fact family for the array shown. => 6 × 3 = 18 or 6 + 6 + 6 = 18 or 2 × 5 = 10 or 2 + 2 + 2 + 2 + 2 = 10 or 2 × 10 = 20 or 2 + 2 + 2 + 2 + 2..

Of the four facts given, which one gives the least quotient? => 36 ÷ 3 or 36 ÷ 6 or 36 ÷ 9 or 36 ÷ 2..

Choose a multiplication fact shown by the model. => 3 + 3 = 6 or 1 × 5 = 5 or 1 + 5 = 6 or 2 × 3 = 5..

Identify the basic fact that helps you in finding 80 ÷ 2. => 8 ÷ 2 or 8 ÷ 4 or 8 × 2 or 8 × 4..