• Support PF! Buy your school textbooks, materials and every day products Here!

How do you find the charge of an atom?

  • Thread starter alewisGB
  • Start date
  • #1
15
0
Calculate the electrostatic force between a proton and a gold nucleus Au with a distance 7.5x10-13m
19797Au

The Electrostatic force is (Q1Q2)/4∏ε0d2

Two things I want to know, the charge of the gold and how to find the charge of Atoms!
All I need to know is the charge, I can do the rest!
 

Answers and Replies

  • #2
1,506
17
Au has 97 protons (and electrons) therefore the charge on the nucleus is +97 x electron charge. The charge on the proton is +1 electron charge
Electron charge is 1.6 x 10 ^-19 C
 
  • #3
15
0
Au has 97 protons (and electrons) therefore the charge on the nucleus is +97 x electron charge. The charge on the proton is +1 electron charge
Electron charge is 1.6 x 10 ^-19 C
Thanks!
 
  • #4
epenguin
Homework Helper
Gold Member
3,652
719
That is what it is but your question was how do you find out? What will you do if the next question is about lead or other element nucleus?

You didn't know that is the atomic number which you will find in every periodic table, not to be confused with atomic mass which you will find in the same table?
 
  • #5
Redbelly98
Staff Emeritus
Science Advisor
Homework Helper
Insights Author
12,098
129
Au has 97 protons
No it does not.

Let's please let the OP find the correct number.
 
  • #6
1,506
17
sorry Redbelly98 and alewisGB!!!! __ protons not 97.
Very sloppy of me, easy to check with periodic table. I suppose whether it is gold or not is irrelevant, OP should find out what to look for.
 
Last edited by a moderator:
  • #7
Redbelly98
Staff Emeritus
Science Advisor
Homework Helper
Insights Author
12,098
129
As I said, let the OP find the correct number. (As you said, it's easy to check with periodic table.)
 

Related Threads on How do you find the charge of an atom?

Replies
4
Views
1K
Replies
12
Views
744
Replies
3
Views
435
Replies
5
Views
2K
  • Last Post
Replies
0
Views
3K
  • Last Post
Replies
5
Views
4K
Replies
3
Views
2K
Replies
2
Views
856
Replies
6
Views
212
Top