Answer:
B) 82 protons
Explanation:
The number of protons for an element never change. 82 Is the atomic number for Pb which is how many protons it has. An isotope means it has more neutrons.
Atomic mass is the total mass of neutrons and protons in a certain isotope. It is usually called: AMU or atomic mass unit.
It is A)The smallest unit of Ne
Answer:
a compound,typically a crystalline one,in which water molecules are chemically bound to another compound or an element