The original atomic weights were based on the mass of hydrogen.
The first scientist to determine atomic weights for elements was John Dalton, an English chemist and physicist.
Dmitri Mendeleev created the periodic table to organize and classify the elements based on their properties and atomic weights, allowing for easier understanding and prediction of element behavior.
The original atomic bomb testing ground was in Almogordo, New Mexico.
well, the atomic bomb research was done by Robert oppenheimer. the original creation or idea was from albert Einstein
There was no single "original invention".
Because atomic weights must be measured in fractions.
Actually weights are too small and are hard to work with.
Atomic Mass
The atomic weight of Br (Bromine) is the sum of the atomic weights of Cl (Chlorine) and I (Iodine). This is because bromine falls between chlorine and iodine in the periodic table, thus its atomic weight is approximately the average of the atomic weights of chlorine and iodine.
John Dalton determined the atomic weights of several elements, including hydrogen, oxygen, carbon, nitrogen, and sulfur, among others. He used hydrogen as the reference point with an atomic weight of 1, assigning relative weights to other elements based on their combinations with hydrogen. Dalton's work laid the foundation for the modern understanding of atomic theory and the relative weights of elements. His findings were crucial in advancing the field of chemistry in the early 19th century.
Dalton's fourth postulate states that atoms of different elements have different weights. This idea laid the foundation for the concept of atomic mass and helped to distinguish between different elements based on their atomic weights.
In 1869 Russian teacher and scientist Dmitri Mendeleev, presented a periodic table of the elements based on atomic weights. The current periodic table is arranged by the atomic numbers of the elements.
The first scientist to determine atomic weights for elements was John Dalton, an English chemist and physicist.
True. The unit for the atomic weights of chemical elements is the relative atomic mass unit (1/12 from the atomic mass of the isotope 12C). Note that atomic weights is used for elements and atomic mass for isotopes.
both the atomic number and the atomic mass remain the same
Relative atomic masses are often used in place of atomic weights. They represent the weighted average of the masses of the isotopes of an element relative to the mass of a carbon-12 atom.
Edward Vogel has written: 'The atomic weights are, under atmospheric pressure, not identical with the specific gravities' -- subject(s): Atomic weights