
Concept explainers
Interpretation:
Five elements that have radioactive isotopes on the periodic table must be given. The neutron to proton ratio must be calculated for all those in decimal form.
Concept introduction:
Radioactive elements are those which have very high (greater than 1.54) neutron to proton (n/p) ratio.

Explanation of Solution
The name of five elements having radioactive isotopes are Uranium, Neptunium, Plutonium, Americium and Thorium.
In this way, all the n/p ratios are calculated for the listed isotopes.
The neutron to proton ratio of
The neutron to proton ratio of
The neutron to proton ratio of
The neutron to proton ratio of
The neutron to proton ratio of
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