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2. Atoms & Elements - Part 1 of 4

2. Atoms & Elements / Isotopes / Problem 5

Identify which among the isotope symbols below is incorrect.
(i) ⁴⁰₁₉P (ii) ¹²⁰₅₀Sn (iii) ²⁹₆₃Cu (iv) ¹⁰⁹₄₇Au (v) ⁵⁸₂₆Fe

A

(i), (ii), and (v)

B

(iii) and (iv)

C

(i) and (iv)

D

(ii), (iv), and (v)

E

(i), (iii) and (iv)

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