Question

How many proton must compound have if it had 50 electrons and a net charge of 9.6*10^-18C

Answer 1

110

Step-by-step explanation:

The net charge of the compound is the sum of the net charges due to the electrons and the protons:

`Q=N_p q_p + N_e q_e`

where

Np is the number of protons

Ne = 50 is the number of electrons

`N_p = +1.6\cdot 10^(-19) C` is the charge of each proton

`N_e = -1.6\cdot 10^(-19) C` is the charge of each electron

`Q=+9.6\cdot 10^(-18) C` is the net charge of the compound

Solving the equation for Np, we find the number of protons:

`N_p = (Q-N_e q_e)/(q_p)=(+9.6\cdot 10^(-18)C-(50)(-1.6\cdot 10^(-19)C))/(+1.6\cdot 10^(-19) C)=110`