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Question 70

A neutral atom of a radioactive isotope of fermium is represented by the symbol:

{}_{100}^{257}\text{Fm}

A different radioactive isotope of fermium is ionised to form a $Fm2+\text{Fm}^{2+}$ ion. Which of the following correctly identifies the nuclear symbol of this different isotope and the number of electrons orbiting its nucleus?

Nuclear symbol:

{}_{100}^{255}\text{Fm}

, number of electrons: $98$

Nuclear symbol:

{}_{100}^{255}\text{Fm}

, number of electrons: $102$

Nuclear symbol:

{}_{98}^{257}\text{Fm}

, number of electrons: $98$

Nuclear symbol:

{}_{100}^{257}\text{Fm}

, number of electrons: $98$

Markscheme

6 Radioactivity Questions

GCSE
Physics
6 Radioactivity

6 Radioactivity

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6 Radioactivity

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Question 70

A neutral atom of a radioactive isotope of fermium is represented by the symbol:

{}_{100}^{257}\text{Fm}

Nuclear symbol:

{}_{100}^{255}\text{Fm}

, number of electrons: $98$

Nuclear symbol:

{}_{100}^{255}\text{Fm}

, number of electrons: $102$

Nuclear symbol:

{}_{98}^{257}\text{Fm}

, number of electrons: $98$

Nuclear symbol:

{}_{100}^{257}\text{Fm}

, number of electrons: $98$

Markscheme

6 Radioactivity Questions

GCSE
Physics
6 Radioactivity