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.

Table 1 showed the element composition of all the concrete samples obtained from the x-ray micro analysis, it can be observed from the table that the amount of Oxygen (O) is more than any other element in all the samples; this is because it is the dominant element in concrete, both it mass and atomic percentage reduces as the amount of rubber crumb increases in the concrete, the magnesium (Mg) also reduces in mass and atomic weight as rubber crumb increases, the same condition applied to silicon (Si), with the exception of sample [C.sub.12] which has higher proportion of silicon in it.

Our words have no heavenly atomic weight of creation; they brush against a facet of meaning only.

the same as its atomic weight (AW, 14.0067) and exactly twice its AN (7).

Strontium has a greater atomic weight than calcium: "...

Heavy metals are elements having atomic weight from 63.54 to 200.59, and a specific gravity greater than 4.

The quantity [w.sub.i] is given by [w.sub.i] = [n.sub.i][A.sub.i]/[[summation].sup.n.sub.j][n.sub.j][A.sub.j] with condition [[summation].sup.n.sub.i][w.sub.i] = 1, where [A.sub.i] is the atomic weight of the ith element and [n.sub.i] is the number of formula units in the compounds.

"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.

Its atomic number, atomic weight, and mass volume are 90, 232, and 11.7 gram/cubic centimeter, respectively.