Question 3(2013)
Using the information below about X and Y – complete the following questions :
| X-2,8,7 | Y-2,8,2 |
|---|---|
| Dissolves in water and turns blue litmus red | Very low solubility in water. Dissolves in HCl |
| Tends to oxidise elements and compounds | Tends to act as a reducing agent |
| Poor electrical and thermal conductivity | Good electrical and thermal conductivity |
| No tendency to form alloys | Forms alloys |
(i) ............... is the metallic element.
(ii) Metal atoms tend to have a maximum of ............... electrons in the outermost energy level.
(iii) Non-metallic elements tend to form ............... oxides while metals tend to form ............... oxides.
(iv) Non-metallic elements tend to be ............... conductors of heat and electricity.
(v) Metals tend to ............... electrons and act as ............... agents in their reactions with elements and compounds.
(i) Y is the metallic element.
(ii) Metal atoms tend to have a maximum of three electrons in the outermost energy level.
(iii) Non-metallic elements tend to form acidic oxides while metals tend to form basic oxides.
(iv) Non-metallic elements tend to be bad conductors of heat and electricity.
(v) Metals tend to lose electrons and act as reducing agents in their reactions with elements and compounds.