why the atomic weights are in fractions?



why the atomic weights are in fractions?..

Answer / biomaster

The atomic weights are in fractions because of the presence
of isotopes for a particular compound.

Is This Answer Correct ?    12 Yes 2 No

Post New Answer

More Physical Chemistry Interview Questions

a sample of gas occupies a volume of {450.0 ml}at {740 mm Hg}and[16C]determine the volume of this same sample at [760 mm Hg]and [37c]?

0 Answers  


During Soundness testing of Cement by Lechatelier method the Cement mould expands about 20 mm when merged in curing water for 24 hours after mould preparation.In that Cement MgO content is about 3.0%,SO3 is about 2.6% & Blaine is about 360 M2/Kg.Guess the reason & suggest solution.

0 Answers  


The use of vermilion on rubric of the Tartar Relation is confirmed by the presence of three lines attributed to HgS. Why should this diatomic have more than one vibrational line?

0 Answers  


The rate constant for the second order reaction is 0.54/M.s at 300oC. How long (in sec) would it take for the concentration of NO2 to decrease from 0.62M to 0.28 M? 2NO2(g) 2 NO(g) + O2(g)

0 Answers  


what kind of question can be asked in interview for polarimeter related ?

0 Answers   Ami Organics,


Give an expression for Ka for ethanoic acid?

3 Answers  


How much is the molar extinction coefficient of methylene blue at wavelenght 664 nm? Are molar extinction coefficient depend on concentration of solution?

3 Answers   Indfrag Limited,


what is little silver

2 Answers  


How can be set a responds factor for evaluating a unknown impurity by HPLC

0 Answers   Orchid,


As per X-ray Fluorescence theory, when material particle is irradiated with X-ray the electron of innermost orbital of that element atom is exited and emits outside of the atom as photoelecrons, living behind a hole in innermost orbital . This hole is filled by outer orbital electrons. The question is that finely what happens to that photo electon which is emitted outside of the atom?

1 Answers   Grasim,


why athanol-water mixtuere have maximum viscocity in wt% 40?

0 Answers   ME,


What is Downward Displacement of Water?

11 Answers   BARC, RyanAir,


Categories
  • Organic Chemistry Interview Questions Organic Chemistry (342)
  • Inorganic Chemistry Interview Questions Inorganic Chemistry (123)
  • Analytical Chemistry Interview Questions Analytical Chemistry (1387)
  • Physical Chemistry Interview Questions Physical Chemistry (62)
  • General Chemistry Interview Questions General Chemistry (478)
  • Chemistry AllOther Interview Questions Chemistry AllOther (190)