Q33. Order the following elements from the lowest atomic number to the highest carbon,

sodium, hydrogen, potassium, aluminum.

Q34. The pure metal aluminum was very rare and extremely expensive until relatively

recently. Find out how aluminum was prepared and the year when it was first isolated.

Q35. Find out the most common uses of the metal copper. Identify the physical properties of

copper that makes it well suited to those uses.

Q36. Find out the most common uses of the metal gold. Identify the physical properties of

gold that makes it well suited to those uses.

Q37. Find out the most common uses of the metal magnesium. Identify the physical

properties of magnesium that makes it well suited to those uses.