Mostly heavy atomic element has an unbalanced number of protons and neutron. If the number of the neutron to proton ratio is greater than 1 for an element then that element has radioactivity characteristics and this type of element is unstable in a free state.
From the experiment, it has found that electron and proton are charged particles, and neutron is a neutral particle. Means electron and proton have charge and neutron have no charge.
Charges on electron and proton are given below:-
Charge on electron = -1.6
x 10-19 coulomb it is absolute charge of electron .
Charge on Proton = +1.6
x 10-19coulomb
quantity 1.6
x10-19 is written as e.
it will be positive for proton and negative for neutron.
if an element has five electrons then the total charge on that element will be written as -5e. if you want to calculate this charge in coulomb then it will be done like this.
5 x-1.6
x 10-19 = 8 x 10-19 coulomb.= -5e
We will clear it with a question.
Calculate net charge on a isolated atom which has 3 electron and 2 proton.
no of electron =3
no of proton = 2
net charge on atom = -3e + 2e = -e = 1.6 x10-19 coulomb.
Mass of Electron In Gram | Mass of Proton In Gram
As we Know that Electron, Proton, and Neutrons are Fundamental particles of any things. These all three particles exist in an atom. The mass of an atm is the sum of the individual mass of electrons, protons, and neutrons. So the mass of these particles are givens as
Me =9.109 x 10-28 gram (mass of electron)
Mp = 1.672 x 10-23 gram (Mass of Proton)
Mn = 1.675 x 10-23 gram (Mass of Neutron)
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