Quote:
|
How do you find the # of protons and neutrons in an element :?:
|
Here's how.
Mass # = # of protons + # of neutrons
# of neutrons = Mass # - # of protons
# of protons = atomic # for neutral atoms.
Radium has an atomic number of 88 and a mass number of 226. For radium therefore:
# of protons = 88
# of neutrons = mass # - # of protons = 226 - 88 = 138
I hope this helps you.
