A. Mass of an atom itself is in fraction
B. Atomic masses are average masses of isobars
C. Atmoic masses are average masses of isotopes proportional to their relative abundance
D. Atmoic masses are average masses of isotopes
Related Mcqs:
- The atomic radii decreases by increasing atomic number in________________?
A. Alkali metal
B. Alkaline earth metal
C. Elements from Li to Ne
D. Halogens - The number of isotopes of elements with even mass number and even atomic number are ________________?
A. 280
B. 300
C. 154
D. 54 - Actinides are the elements with atomic number from:
A. 97 to 104
B. 101 to 115
C. 89 to 103
D. 36 to 43Submitted by: Fahad Mehsud
- Actinides are the elements with atomic numbers from __________?
A. 97 to 104
B. 101 to 115
C. 89 to 103
D. 36 to 43Submitted by: Fahad Mehsud
- Mostly ionic compound are produced in between elements of_________________?
A. IA and VIA
B. IA IIA and VIIA
C. IB and VIIB
D. IA and IB - Which of the p-block elements are not representative elements ?
A. Alkali metals (I-A)
B. Group-14 elements (IV-A)
C. Group-18 elements (VIII-A)
D. Halogens (VII-A) - In alkaline battery the anode is made up of______________________?
A. MnO2
B. Zn
C. AgO2
D. cadmium - Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?
A. one / seventeen
B. sixteen / seventeen
C. one / three
D. two / three - The amount of Benzene is obtained from Coal Tar on its Fractional Distillation?
A. 1-2Kg
B. 1-3Kg
C. 1-4Kg
D. 1-5KgSubmitted by: Aamir khan Hullio
- How many isotopes have odd atomic number ?
A. 154
B. 280
C. 86
D. 300
12 Comments
Right answer is???
Option “C” is correct.
Which one is correct answer ???
What is the right option?
I think it would be D.
I think D option is correct
Because fractional atomic mass is taken as the average mass of the isotopes of elements.
C. atomic masses are average masses of isotopes proportional to their relative abundance
Each isotope will contribute to the average atomic mass of the element proportionally to its abundance.
The atomic masses of most elements are fractional because they exist as a mixture of isotopes of different masses.
D. atomic masses are average masses of isotopes
Atomic masses are average masses of isotopes proportional to their relative abundance
D option is correct
Which option is the correct answer?
option C is correct