In fact, it is precisely the variation in the number of neutrons in the nuclei of atoms that gives rise to isotopes. The three share the place in the periodic table assigned to atomic number 1 and hence are called isotopes (from the Greek isos, meaning "same," and topos, signifying "place") of hydrogen.Many important properties of an isotope depend on its mass.
Geology is the study of the composition and physical properties of rocks, minerals, gems and other related earth materials, including diamonds and crystals.
Scientists gain an understanding of the Earth's history by studying its composition.
Nearly a century later Darleane Hoffman and her collaborators are devising new radiochemical separation procedures for studying the chemical properties of newly discovered transactinide elements.
Safety requirements as well as changes necessitated by fast decaying radionuclides have transformed the nature of radiochemical separations.
There is a greater part of man’s unwritten past that archaeology has managed to unravel.
Studying the material remains of past human life and activities may not seem important or exciting to the average Joe unlike the biological sciences.
The total number of neutrons and protons (symbol A), or mass number, of the nucleus gives approximately the mass measured on the so-called atomic- mass-unit (amu) scale.
Radioactive substances will give out radiation all the time, regardless of what happens to them physically or chemically.
It is also the time it takes for the count-rate of a substance to reduce to half of the original value.