207.2
relative atomic mass
All elements have an atomic mass relative to 12C having a mass of 12.
Lead, with symbol Pb.
The element lead consists of four naturally occurring isotopes with atomic masses 203.97302, 205.97444, 206.97587, and 207.97663 . The relative abundances of these four isotopes are 1.4, 24.1, 22.1, and 52.4%, respectively.
207.2
relative atomic mass
relative Atomic Mass
Lead (Pb) has the atomic number 82 with an Atomic Mass of 207.2 amu.
the relative atomic mass for the element potassium is 39.0983
The atomic number of lead, Pb, is 82. Its atomic mass depends on the isotope, as the number of electrons can vary. Its atomic weight (average relative mass ) on the periodic table is 207.2.
All elements have an atomic mass relative to 12C having a mass of 12.
Lead, with symbol Pb.
Relative atomic mass, also called atomic weight, is listed on the periodic table for each element. There is no element listed on the periodic table with a relative atomic mass of 15.5.
The Relative Atomic Mass of Sodium is 23.
Atomic mass is so small you can't actually measure it. So, just like carbon dating, you have to use a relative mass.
The element lead consists of four naturally occurring isotopes with atomic masses 203.97302, 205.97444, 206.97587, and 207.97663 . The relative abundances of these four isotopes are 1.4, 24.1, 22.1, and 52.4%, respectively.