Structure of th...

Identify the sub-atomic particle(s) with no charge and relative mass equal to one among the following:

Elements X, Y, and Z have atomic numbers 6, 9, and 12 respectively. Which one has four electrons in its valence shell?

All atoms contain neutrons in their nuclei except:

Determine the number of electron in the isotope of 'H' (mass no. 2).

What are imaginary paths around the nucleus in which electrons revolve?

Match the atomic numbers 4, 14, 8, 15, and 19 with a non-metal of valency 4.

How many nucleons are present in phosphorous?

Order of magnitude of density of uranium nucleus is :
$\left( { m }_{ p }=1.67\times{ 10 }^{ -27 }kg \right)$ 

Rutherford's $\alpha$-scattering experiment led to the following conclusion(s):

The heaviest subatomic particle is: