What is the highest atomic number of stable isotopes?

Tin, atomic # 50 has 10 stable isotopes, the highest for any element owing to the “magic” number of protons. In addition, 29 additional unstable isotopes of tin are known to exist.

Are there stable nuclides with atomic numbers larger than 83?

Note that all isotopes of elements with atomic numbers greater than 83 are unstable. The solid line is the line where n = Z. The nuclei that are to the left or to the right of the band of stability are unstable and exhibit radioactivity.

Which elements have stable isotopes?

Stable Isotopes Chart – Stable Isotopes of all the elements in table chart

Why are all isotopes with Z 83 unstable?

All other stable nuclei have a higher neutron-to-proton ratio, which increases steadily to about 1.5 for the heaviest nuclei. Regardless of the number of neutrons, however, all elements with Z > 83 are unstable and radioactive. Figure 21.2.

Why are there no stable nuclides for Z 83?

As the atomic number increases further, Z > 83, all nuclides are unstable. Even though N/Z ratios reach 1.5, nuclear stability is not achieved when the number of protons in the nucleus exceeds 83.

How many stable isotopes are there?

254
There are two main types of isotopes: stable and unstable (radioactive). There are 254 known stable isotopes.

Are isotopes stable or unstable?

Stable isotopes are naturally occurring forms of elements that are non-radioactive. Unstable isotopes are atoms having unstable nuclei. Therefore, these elements undergo radioactivity. This is the main difference between stable and unstable isotopes.

Why are all elements with an atomic number of 82 or higher unstable?

When the mass number of the atom is greater than 82, the atoms are not stable because of the level of binding energy. The repulsive force between the particles is more.

What makes an isotope stable or unstable?

A stable isotope is one that does not undergo spontaneous nuclear decay. An unstable isotope is one that does undergo spontaneous nuclear decay.

Why are all elements with atomic numbers above 82 unstable?

When the mass number of the atom is greater than 82, the atoms are not stable because of the level of binding energy. The atom splits because of the force of repulsion between the particles and the new elements are formed as they reach the new configuration which is stable. …

What is the half life of an isotope of an element?

Isotope half-lives. Of the first 82 elements in the periodic table, 80 have isotopes considered to be stable. to be 1.9×10 19 years. Technetium, promethium (atomic numbers 43 and 61, respectively) and all the elements with an atomic number over 82 only have isotopes that are known to decompose through radioactive decay.

Why do odd numbered elements have less stable isotopes?

Since a nucleus with an odd number of protons is relatively less stable, odd-numbered elements tend to have fewer stable isotopes. Of the 26 ” monoisotopic ” elements that have only a single stable isotope, all but one have an odd atomic number — the single exception being beryllium.

What is the heaviest stable element in the periodic table?

Technetium and promethium ( atomic numbers 43 and 61, respectively) and all the elements with an atomic number over 82 only have isotopes that are known to decompose through radioactive decay. No undiscovered elements are expected to be stable; therefore, lead is considered the heaviest stable element.

Do all elements have the same number of isotopes?

Many of the chemical elements have a number of isotopes. The isotopes of an element have the same number of protons in their atoms (atomic number) but different masses due to different numbers of neutrons. In an atom in the neutral state, the number of external electrons also equals the atomic number.