Using general trends, predict the stability of the following nuclei. a. silicon-28 b. arsenic-82 c. radium-228

Question

Using general trends, predict the stability of the following nuclei.

a. silicon-28
b. arsenic-82
c. radium-228
d. zinc-64
e. potassium-40

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Tài Đức 4 years 2021-08-21T15:00:01+00:00 1 Answers 29 views 0

Answers ( )

  1. binhan
    0
    2021-08-21T15:01:22+00:00
    Reply

    Answer:

    stable nuclei are silicon-28, zinc-64
    ,  potassium-40

    while unstable one are arsenic-82
    , radium-228

    Explanation:

    There is rule to predict stability of a nuclei that is

    Z <= 20 N/Z = 1  most stable

    Z = 20-40 N/Z = 1.25 stable

    Z = 40-80 N/Z = 1.80  less stable

    Z >= 83,  nucleus becomes unstable or radioactive

    Here, N/Z  = no. of neutrons/ No. of protons

    1. silicon-28 , N/Z =14/14 = 1 stable

    2. arsenic-82, N/Z = 49/33 = 1.48 (unstable)

    3. Potassium-40 , N/Z = 21/19 = 1.10(stable)

    4. zinc-64, N/Z =34/30 = 1.13 (stable)

    5. radium-228  (unstable, radioactive)

    Therefore, stable nuclei are silicon-28, zinc-64
    ,  potassium-40

    while unstable one are arsenic-82
    , radium-228

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