Question

The mass number of iodine is 126, and it’s in the 53rd place in the periodic table. It has
protons and
neutrons.

Answer 1

Answer:

atomic mass of iodine = 126

Atomic number of iodine = 53

Number of protons = Atomic number=> 53

Atomic mass = Protons + Neutrons

126 = 53 + neutrons

Neutrons = 126 - 53

= 73

hence ,

number of protons = 53

Number of neutrons = 73

Explanation:

hope it helps you

Answer 2

Answer:

53 protons

73 neutrons

The mass number of iodine is 126, and it’s in the 53rd place in the periodic table. It has 73 protons and 53 neutrons.

The mass number of an element is the sum of the number of protons and the number of neutrons in the nucleus of an atom of the element.

Therefore, the mass number of Iodine is 126, which means the sum of its protons and neutrons is 126.

Atomic number of an atom on the other hand is the number of protons in the nucleus of the atom. The atomic number of Iodine is 53 , which means its nucleus has 53 protons.

Thus, to get the number of neutrons we subtract the atomic number from the mass number, which will be 73 neutrons.