Q. The student of class IX have made a tabular game showing the symbols of some elements and the valencies of these elements. These blocks of the table somehow got mixed up as shown below:
| Li | C | 2 | P |
| 3 | 1 | O | 5 |
| He | 0 | 4 | Cl |
On basis of these blocks, the teacher asked a student to volunteer and Vikas stood up take up the challenge. The teacher asked him to answer the following questions:
a. Choose the symbol of an element from among the blocks which exhibits valencies of 3 and 5. What is the name of this element? Is it a metal or a non-metal?
b. Work out the formula of the compound formed between the element of valency 3 and the element of valency 2. Also name the compound.
c. What values are displayed by Vikas during this session in the class?
Dear student,
- The element P will exhibit valency of 3 and 5 . The name is Phosphorus and it is a non metal.
- The element having valency 3 is P and valency 2 is O . So th formula would be P2O3.
- Vikas is a child who is interested in doing work. He is not a shy child and bold enough to take responsibility.
