Question

If an element's atomic number is 23 and its mass number is 47, what will be the number of neutrons present in one atom of the element?

Answer 1

Analyzing the given data:

• The atomic number of the given element (Z) = 23
• The atomic number of an element is equal to the number of protons or electrons present in the neutral atom.

Mathematically, Number of electrons = Number of protons = Atomic number = 23

• Mass number of the given element (A) = 47
• The mass number of an element is defined as the sum of the number of protons and the number of neutrons present in an atom.

Mathematically, Mass number = Number of protons + Number of neutrons

Now, Number of neutrons = Mass number - Number of protons(Atomic number)

Number of neutrons = 47 - 23 = 24

Therefore, the number of Neutrons present in one atom of the element having atomic number 23 and mass number 47 = 24