Question

type the correct answer in each box. the mass number of iodine is 126, and its in the 53rd place in the periodic table. it has protons and neutrons.

Explanation:

Step1: Recall proton - atomic number relationship

The atomic number is equal to the number of protons. Iodine is in the 53rd place in the periodic table, so the atomic number is 53. Thus, the number of protons = 53.

Step2: Calculate number of neutrons

The mass number is the sum of protons and neutrons. Given mass number = 126 and number of protons = 53. Let the number of neutrons be $n$. Then $126=53 + n$. Solving for $n$, we get $n=126 - 53=73$.

Answer:

53, 73