Soddy had worked out the isotope concept in connection with radioactive elements (see above), but these were available in such tiny quantities that atomic weights
could not be determined, and the existence of isotopes could not be checked in that way.
The presence of this new gas as an impurity in the nitrogen obtained from air gave the nitrogen an abnormally high atomic weight
, whereas nitrogen obtained from chemicals without any admixture of this impurity gave the true atomic weight
BCSEA, in-charge of conducting exams in high schools in Bhutan, made a critical change to class X Chemistry paper starting this year where students were no longer given atomic weight
table during the exam.
Our words have no heavenly atomic weight
of creation; they brush against a facet of meaning only.
Shortly thereafter, though, the German chemist Lothar Meyer claimed to be first to perceive the periodicity in the properties of the elements when ordered by atomic weight
Silicon has an atomic weight
of 28, oxygen is 16, carbon is 12, and hydrogen is 1.
A full suite of image processing functions are also available to enable better discrimination between elements with similar average atomic weight
Strontium has a greater atomic weight
than calcium: ".
Heavy metals are elements having atomic weight
Since the muon angular trajectory changes as a function of the density and atomic weight
of the material traversed, a unique "signature" for the substance can be developed.
We thought long and hard about whether to keep the name Iridium, because that really represented the previous company, in that iridium has an atomic weight
of 77, and there were originally 77 satellites," Desch says.
First, we've thought of facts as being the primitives of knowledge, the simple atoms out of which all knowledge is constructed: The atomic weight
of helium is 4.
Uranium is shiny silvery metal with atomic number of 92 and atomic weight
Answer: O, because it has a lower atomic weight
than S, even though both have six valence electrons.
The Atomic Weight
of Secrets or the Arrival of the Mysterious Men in Black.