Yes, isotopes have different physical properties.
Isotopes are exactly same with respect to all the chemical properties but they differ with respect to physical properties.
All isotopes of a substance are chemically the same. It is their physical properties which are different.
Isotopes contribute to the atomic weight of a chemical element.
The number of neutrons is different; the differences between physical properties exists but are extremely small.
The physical properties are of course different. The chemical properties are considered identical but this is not a general rule; for example hydrogen isotopes (1H and 2H) have some different chemical and biochemical properties.
Yes, hassium is a synthetic element with no stable isotopes. It is highly radioactive, and its physical properties have been difficult to study in detail due to its short half-life. Its properties are largely predicted by its position in the periodic table.
The differences in chemical properties are not significant (excepting protium and deuterium); the physical properties are different.
A natural chemical element may be monoisotopic or has isotopes. Isotopes are atoms but they differ from other isotopes by the number of neutrons. This involve a different atomic mass and different physical properties or sometimes (for light isotopes) different chemical properties. Also, all chemical elements have radioactive, artificial isotopes.
The number of neutrons in the atoms. This affect some physical properties.
Isotopes of an atom have the same number of protons but different numbers of neutrons. This causes isotopes to have different atomic masses. The chemical properties of isotopes are usually identical, but physical properties such as nuclear stability and radioactive decay can vary.
Isotopes of an element have the same number of protons but different numbers of neutrons. This results in differences in atomic mass and stability. Isotopes may have different physical properties, such as melting point and boiling point, as well as different chemical behaviors.
They have all the chemical, physical, nuclear properties identical. This is not the case for isotopes.