Because they are Isotopes thats why because isotopes have the same atomic number but diffrent mass number
The B. atomic mass of an atom is based on the mass of an atom of carbon-12.
The <em>ionic charge</em> depends on the number of <em>electrons</em>.
The <em>atomic number</em> depends on the number of <em>protons</em>.
<em>Isotopes</em> depend on the number of <em>neutrons</em>.
Answer:
1. C
2. C
Explanation:
were made of many many cells, fertilized egg is our first cell
