PART 1 (3A)

GROUP IIIA is also known as the?

What element are the most important in pharmacy?

Only one element to be considered as abundant

Most common metals and third most common element in the earth's crust

Two elements that are more abundant

Tends to be more covalent than ionic, which is also referred to as metalloid

This element may form both covalent and ionic bonds

The metals of this group readily oxidizes when heated in air. And they are stable at ordinary temperatures. Is it true or false?

The oxides are readily reduced back to free metal

The metal reacts readily with what elements?

white gelatinous ppt. of Al(OH)3

Co(NO3)2 + NH3 à Co(AlO2)2

adsorbs the color of the dye,
aluminon producing a red lake

cobalt meta-aluminate

will turn turmeric
paper brownish red; while in basic or
alkaline medium it will color the turmeric
paper greenish black

CH3OH + H2SO4 è (CH3)3BO3

methyl borate

• Non-metal
• Component of glass

Valuable substitute for diamond in glass
cutting and gem polishing

• Reacts with turmeric paper
• Use in vulcanizing rubber