What kind of atoms typically have unstable nuclei?

Question

What kind of atoms typically have unstable nuclei?

atoms with a neutron count greater than 90
atoms with a neutron count less than 90
atoms with a proton count less than 90
atoms with a proton count greater than 90

is it d?

Answer 1

probably d is the best choice. Atoms are unstable because the binding force is less than the repulsive force of protons.

Answer 2

Yes, you are correct. Atoms with a proton count greater than 90 typically have unstable nuclei. These atoms are called elements with atomic numbers greater than 90, known as transuranium elements. They have a high number of protons, which makes their nuclei highly unstable, leading to radioactive decay. Some well-known examples of such elements are uranium (atomic number 92), plutonium (atomic number 94), and curium (atomic number 96).

Answer 3

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What kind of atoms typically have unstable nuclei?

probably d is the best choice. Atoms are unstable because the binding force is less than the repulsive force of protons.

thank you