Sussy Chemistry 2

Which following about noble gas is correct?

• Unreactive

• Colourless gas

• Reative

• High density

Which is the uses of Argon?

• Fill balloons

• Advertising signs

• Eye surgery laser

• Make tungsten filament

Which following is correct about alkali metals?

• Low density, but increases down the group

• Grey - silvery

• Soft, the softness increases down the group

• Trends of melts is increase down the group

The reactive of halogens is....

• Increase down the group

• Decrease down the group

• No changes

Which following is correct about the product in the reaction of water and alkali metals?

• Only Hydrogen

• Metal oxide

• Oxygen + hydrogen

• Metal hydroxide + hydrogen

Which following is wrong about flame test?

• Copper ion = blue - green

• Barium ion = Red - orange

• Potassium ion = lilac

• Sodium = brown

Which halogen is liquid form in a room temperature?

• I2(Iodine)

• F2

• Br2

• At2

• Cl2

Choose the correct color of halogens

• I2(Iodine)(aq)=yellow

• I2(Iodine)(l) =purple

• Br2 (aq)=orange

• Br2(l)=red brown

Which is basic oxide in period 3?

• Na

• Al

• Cl

• S

Select the correct information about Period 3

• The atomic size decrease from Na to Ar

• The valance electron decrease across period 3

• Si is a basic oxide

• 2.8.4 is metalloid