Question

A certain isotope has 53 protons 78 neutrons and 53 electrons. What is its atomic number? What is the mass number of this atom? What is the name of this element? What is the name of this group of elements

Answer 1

Answer:

1. 53 protons
2. 131g
3. Iodine
4. Halogens

Explanation:

atomic no. = no. of protons

= 53 proton

mass = no. of protons + no. of

neutrons

= 53 + 78

= 131