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?
Can you please explain that why all noble gases are monoatomic only ?
Thank You !
Q.A) Calculate the number of ions present in 54 g of aluminum oxide.
2. What do the following abbreviations stand for ? Which one of them is more stable .
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:
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?
a) State the Law of Constant/ Definite Proportion. Explain the law formula of CO2 and Ammonia.
Determine the valency of the cations in the given compounds
(i) MSO4 (ii) M(HCO3)2 (iii) M3(PO4)2
Q. Correct the following chemical formula
a)
b)
c)
d)