Question

Q3. Let us apply the things learnt to different situations: (answer in less than 30 words)

a. Give a simple example to explain Dalton's theory that chemical reaction is a The da
rearrangement of atoms.

b. Sodium (Na) is a soft, white metal that catches fire easily while Chlorine (Cl) is a
poisonous gas. However their combination NaCl is the edible common salt.
Explain how this happens.

c. What does the formula H,80 represent? Calculate the atomicity also.

d. What is the difference between the symbol and formula? Explain with
help of an example.

e. An element Y forms a compound H, Y with hydrogen. Another element Z
forms a compound Z,Y, with Y. Find the valencies of Y and Z. (note: we know valency of H=1)

f. Hydrogen sulphide is a bad smelling compound. Rotten eggs get their bad smell from
the H.S they release. Can you infer from this information that sulphur is also just as
smelly?

who will tell I will make him brainlist​

Answer 1

Explanation:

Matter has been one of the most important subjects of research for the science enthusiasts. Scientists and philosophers have always tried to simplify things. They wanted to know about the fundamental particles that make matter, their properties, structure etc. This led to the formulation of a number of atomic theories