The density of platinumi s 21,45 g/cm3. The difference in density between isotopes is not significant.
The atomic mass of the most important isotope of plutonium (239Pu) is239,052 156 34.The standard density of plutonium is 19,816 g/cm3at room temperature; but atomic mass of an isotope is not the density !
Radioactive decay is the process in which one isotope is changed into another isotope.
an isotope of an element
a cosmogenic isotope is an isotope that is created in space by cosmic rays
222 Amu (atomic mass units) Each isotope of radon has a different atomic mass; see the link. The density of radon is 9,73 g/L.
The atomic mass of the most important isotope of plutonium (239Pu) is239,052 156 34.The standard density of plutonium is 19,816 g/cm3at room temperature; but atomic mass of an isotope is not the density !
The density of water can depend on various factors, including:* The exact isotope mix. * Impurities. * Temperature (above 4 °C, water expands when heated; the density decreases).
Isotope A
Radioactive decay is the process in which one isotope is changed into another isotope.
a cosmogenic isotope is an isotope that is created in space by cosmic rays
an isotope of an element
222 Amu (atomic mass units) Each isotope of radon has a different atomic mass; see the link. The density of radon is 9,73 g/L.
That's called a daughter isotope, or a daughter product. (The original isotope that decayed is the parent isotope.)
The density of radium at about room temperature is 5.5  g·cm−3. That's 5.5 grams per cubic centimeter, or 5.5 grams per milliliter. A link to the Wikipedia article on radium is provided.
isotope
The most common isotope of silicon is the isotope 28Si: 92,23 %.
The radioactive isotope is disintegrated in time and emit radiations.