Uranium decomposes radioactively to form thorium (atomic number 90)by emitting an $\alpha$ particle from its nucleus.The force of repulsion between the thorium nucleus and the $\alpha$ particle when the distance between them is 9.0 fm is approximately
A)7.2 fN
B)57 nN
C)4.6 pN
D)1.02 kN
E)0.51 kN

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The Answer of Uranium decomposes radioactively to form thorium (atomic number 90)by emitting an $\alpha$ particle from its nucleus.The force of repulsion between the thorium nucleus and the $\alpha$ particle when the distance between them is 9.0 fm is approximately
A)7.2 fN
B)57 nN
C)4.6 pN
D)1.02 kN
E)0.51 kN

Uranium Decomposes Radioactively to Form Thorium (Atomic Number 90)by Emitting α\alphaα

Uranium Decomposes Radioactively to Form Thorium (Atomic Number 90)by Emitting $\alpha$