PERIODIC TABLE OF ELEMENTS (part 2)

Table below shows the properties of elements W,X ,Y and Z. These letters are not the actual symbols for the elements.

Elements. Property

W Reacts with water to liberate

hydrogen gas

X Burns in excess oxygen to liberate

white fumes

Y Burns with hot iron to form brown

solid

Z Forms coloured ion

Which of the elements W,X,Y and Z is a transition elements?

• W

• X

• Z

• Y

Table below shows the elements found in Period 3 of the Periodic Table.

Na Mg Al Si P S Cl Ar

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Of the following statements, which is true about the elements as you go from left to right in Period Three?

• Atomic size increases

• Metallic properties increases

• Electronegativity increases

• Oxide of elements changes from acidic to alkaline.

Aluminium and Argon are in the same period of the Periodic Table of Elements.Which of the following properties is the same for the both elements?

• Number of shell containing electrons

• Number of valence electron

• Electron arrangements

• Melting points

Which element is likely to be a transition metal?

Element- A melting point- high colour of ion-blue

Element- B melting point-low colour of ion-green

Element- C melting point-high colour of ion-white

Element-D melting point-low colour of ion-white

• D

• C

• B

• A

Which statement shows that iron is a transition element?

• Iron (II) sulphate crystals are green

• Iron (III) oxide is basic

• Iron rust in most air

• Iron reacts with dilute hydrochloric acid

Element W : Proton number - 12

Element X : Proton number - 13

Element Y : Proton number - 14

Element Z: Proton number - 15

Which element is smallest?

• X

• Y

• Z

• W

Which one of the following is the special characteristics of transition element ?

• They are the only metals which form more than one ion

• They are the only metals which form coloured ions in aqueous solutions

• They are the only metals which have high electrical conductivity

• They are the only metals which have high melting and boiling points.

Which of the following does not show a correct use for a transition element in industries?

A. Vanadium (V) oxide - manufacturing sulphuric acid

B. Platinum - manufacturing nitric acid

C. Iron - manufacturing sodium chloride

D. Nikel - manufacturing margarine

• A

• B

• C

• D

Which of the elements does not a transition element?

• Silver

• Iron

• Magnesium

• Manganese

Across period 3, the oxide of elements change from..

• Metal to non-metal

• Acidic to basic

• Basic to acidic

• Acidic to neutral