Chemistry
posted by Brittany .
An alpha particle,4He2+ , has a mass of 4.00151 .
Find the value of its charge to mass ratio in C/kg.
How do I solve this?

the charge is 2*1.6E19 coulombs
the mass is 4*1.672E27 kg
so mass/charge= you do it. 
Thank you!

Nuclei with the same number of neutrons but different mass numbers are called isotones. Write the symbols of four isotones of 236Th