The americium nucleus, 241 95 am, decays to a neptunium nucleus, 237 93 np, by emitting an alpha particle of mass 4.00260 u and kinetic energy 5.5 mev. estimate the mass of the neptunium nucleus, ignoring its recoil, given that the americium mass is 241.05682 u

The mass of Neptunium is 237.054 u.

Explanation:

Given that,

Mass of Americium = 241.05682 u

Mass of alpha particle = 4.00260 u

The equation is,

Let the mass of Neptunium is m.

Since the mass remain same.

We need to calculate the mass of Neptunium

Using formula of mass

Mass of Neptunium =  Mass of Americium -Mass of alpha particle

Put the value into the formula

Hence, The mass of Neptunium is 237.054 u.

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