Respuesta :
Answer : The correct option is, (b) 30
Explanation :
Atomic number : It is defined as the number of protons or number of electrons.
Atomic number = number of protons = number of electrons
Mass number : It is defined as the sum of number of protons and number of neutrons.
Mass number = Number of protons + Number of neutrons
As we are given that,
Atomic number = 26
Mass number = 56
As we know that:
Atomic number = Number of protons = 26
Mass number = Number of protons + Number of neutrons
or,
Number of neutrons = Mass number - Number of protons
Number of neutrons = 56 - 26
Number of neutrons = 30
Thus, the number of neutrons in Fe are, 30
