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Question 19N.1.HL.TZ0.19

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.1.HL.TZ0.19
Level HL Paper 1 Time zone TZ0
Command term Question number 19 Adapted from N/A
19.
[Maximum mark: 1]
19N.1.HL.TZ0.19

Nuclide X can decay by two routes. In Route 1 alpha (α) decay is followed by beta-minus (β–) decay. In Route 2 β– decay is followed by α decay. P and R are the intermediate products and Q and S are the final products.

Which statement is correct?

 

A.  Q and S are different isotopes of the same element.

B.  The mass numbers of X and R are the same.

C.  The atomic numbers of P and R are the same.

D.  X and R are different isotopes of the same element.

[1]

Markscheme

B

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