aswer: protactinium-234 is more dang erous than uranium
Answer:The mass numbr is 22
Explanation:
Mass number=number of protons+ number of neutrons....which is 10+12=22
Answer:
Option D - 10,000 years ago in the Middle East
I think is D A have a nice day
Good luck bye
Answer:
7249.1
Explanation:
Multiply 7.1x1021= 7249.1
