Question

1.What are the difference between isobars and isotopes?

2. One of the spectral line of caesium has a wavelength of 456 nm. Calculate the frequency of the line.(c=3.8×10^8m/s)

3. Explain cations are smaller and anions are larger in radii then other than atoms?

Answer 1

1) Isobars are those element which have same mass number but different atomic number.

Isotopes are those element which have same atomic number but different mass.


2)Frequency =c/wave length =3*10to the power of 18/456 *10to the power of -9=6.5*10to the power of 24.

3) cations are always smaller than the size of the parent atom and where as a anions gain electrons.