Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol. The periodic table’s arrangement also allows scientists to discern trends in ...

The isotope uranium-238 is typically considered to be the heaviest element found in the natural world. It’s atomic mass is 238 – 92 protons and 146 neutrons. Every other element with a higher ...

is the fundamental property that determines an element's position in the periodic table, rather than its atomic mass. Here are some popular mnemonics to help you remember the first 20 elements of ...

The nucleus of each atom contains protons and neutrons. While the number of protons defines the element (e.g., hydrogen, carbon, etc.) and the sum of the protons and neutrons gives the atomic mass, ...

The weighted mean mass of chlorine is 35.5. The relative atomic mass of an element is a weighted mean mass of the isotopes of an element compared with that of the 12 C isotope, which has a mass of ...

February 7 is National Periodic Table Day, when we celebrate the efforts of scientists over the centuries to figure out how different elements ...