what is the charge in coulumbs of the nucleus of a chlorine atom

Question

i mainly want to know how to find the number of electrons.

Q = NUMBER OF ELECTRONS/ 6.25 x 10^18

Answer 1

As J.R.S. explained, the number of electrons in Cl is just the atomic number Z, which you can find in a periodic table of the elements.  If you want the charge of the Cl nucleus, 

 

Q = Ze

 

Z = atomic number = 17

 

e = proton charge = 1.6 x 10^-19 C

 

Q = 17(1.6 x 10^-19 C) = 2.72 x 10^-18 C

 

 

Answer 2

The number of electrons is given by the atomic number, which is 17 for Cl.  Since you are talking about an chlorine atom, and not a chloride ion, there will be 17 electrons present.

However, the electrons are not in the nucleus, and the question asks for the charge of the nucleus of a chlorine atom.