Question

a) who introduced atomic number? Define atomic number
b) What are isotopes? Give an example,
c) States the postulates of kinetic molecular theory.
d) Compare the three states of matter with respect to:
i) Compressibility) 2)intermolecular spaces.​

Answer 1

Explanation:

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Answer 2

Explanation:

(a) Atomic number was introduced by Henry Gwyn-Jeffreys Moseley ...

Atomic number :- The number of protons in the nucleus of an atom ,which is characteristic of a chemical elements and determine it's place in the periodic table..

(b) Isotope:- One of two or more species of an atoms of a chemical elements with the same atomic number and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties..

Ex:- ➡ Carbon-14

➡ Iodine-131

➡ Tritium

(C) Postulate of Kinetic Molecular Theory:-

➡ A gas consists of molecules in constant random motion ...

➡ The molecules collide Elastically with container walls and one another.

➡ The average kinetic energy of molecules is proportional to the Kelvin temperatures of the sample ...

(d) 1. ➡ Solids are completely Compressible..

➡ Liquid are almost incompressible..

➡ Gases are highly incompressible..

2. ➡ In solid,,, intermolecular space are negligible..

➡ In liquid the intermolecular space is more than that of the solid and in gases , , the intermolecular space is largest...

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