metals and non metals

sodium and pottasium are

• soft

• hard

• plaster

• lustrour

which is the only liquid non metal

what is lustour

• Opaque
• Lustrous means shining or glossy.
• Sparkling
• Dull

metals + oxygen gives

• oxygen metals
• metal salts
• metal oxides
• metallic compounds

when iron is kept dipped in copper sulphate solution for about 30 minutes the blue copper sulphate would slowly fade to become green and brown deposition would be seen on the iron nails, why does this happen?

• The green and brown deposition is a natural reaction between iron and copper sulfate.
• Iron displaces copper from copper sulfate solution due to the difference in reactivity.
• The iron nails are absorbing the blue color of the copper sulfate solution.
• Copper displaces iron from iron sulfate solution due to the difference in reactivity.

non metals +--------gives non metalic oxides

• sulfides
• hydroxides
• oxygen

• chlorides

metals such as copper silver do not react with water. true ot false

• false
• maybe
• sometimes
• true

metals react with water and produce _______and ________

• metal oxides and oxygen gas
• metal salts and water vapor
• metallic bonds and heat energy
• metal hydroxides and hydrogen gas

metallic oxide are basic in nature...so it turns

• turns red litmus to blue

• turns blue to red

• nothing happens

• turns purple litmus to blue litmus

4 Na +o2 gives

• 2 Na2O
• Na2O2
• NaO
• 2 NaO