Answer:
Pb has an atomic mass of 82. If an atom of that element has an atomic mass of 80, that atom is known as: an isotope.
Answer:
(Have a nice day)
¶Emma Jess¶
Explanation:
The small structures present within the cell to performed different functions are known as organelles.
U CAN HAVE MORE INFO FROM ATTACHMENT.. THATS MY TEXT BOOK
I think B seems like the answer.