Question

A nuclide of the element plutonium 94 Pu 242. What is the number of neutrons in its nucleus? *​

Answer 1

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Actually Welcome to the Concept of the Nuclear Physics.

A nuclide of the element plutonium that is

$94 {pu}^{242}$

has the Number of Neutrons = 148.

Answer 2

Given: the nuclide of the element plutonium, = Pu₉₄²⁴²

To Find: the number of neutrons, n.

Solution:

To calculate n, the formula used:

• Number of neutrons = Atomic mass - Mass number
• n  =  A - Z
• A nuclide of an element denotes its symbol, mass number (A), and atomic number (Z) of that element.
• Atomic number, Z is written as a subscript of the atomic symbol, and the mass number (A) is written as a superscript.

Applying the above formula:

n  =   A - Z

here, the atomic number of Pu, Z = 94

The mass number of Pu, A = 242

n  =  242 - 94

   = 148

n  =  148

Hence, the number of neutrons is 148.