Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.
QUESTION
7. How many neutrons are there in an atom of lead whose mass number is 208?
7. How many neutrons are there in an atom of lead whose mass number is 208? A) 82 C) 208 E) none of them B) 126 D) 290 8. Atoms of the same element with different mass numbers are called A) ions. C) allotropes. E) isotopes. B) neutrons. D) chemical families.
