Question

9. What are the observations of the experiment don
by Rutherford in order to determine the structure o
10. State the mass number, the atomic number, numb
an atom ?
13A127
17C135
of neutrons and electronic configuration of
following atoms.
13C 100 F 20 Ne. mo l
Also, draw atomic diagrams for each of them.
11. What is variable valency ? Name two element
having variable valency and state their valencies,​

Answer 1

Answer:

Certain elements have more than one valency. They exhibit variable valency. For example, copper, tin, iron and mercury exhibit variable valency.

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Answer 2

guide ohx Uddingston your hofsti