Find the atomic number

CBSE Class 9 CBSE Class 9 Science
1
  1. What is the n/p ratio of 2H image Also, find the atomic number.
  2. Identify the pair of isotopes from the following:
    image
2
  1. Number of neutrons, n =222 -88 = 134
    Number of protons, p = 88
    image
    Atomic number = number of protons = 88
  2. image are isotopes as they have same atomic number but different mass number.