Question Text
Question 2 :
A nucleus of element X is represented as $_{ 26 }^{ 56 }{ X }$<br>Which is an isotope of element X?
Question 6 :
Which of the following is used as standard for determination of atomic mass?
Question 8 :
Which one of the following properties of anelement is not variable?<br>
Question 9 :
The term that would apply to $\displaystyle ^{ 16 }{ O }$ and $\displaystyle ^{ 17 }{ O }$?<br/>
Question 11 :
The isotopes present in naturally occurring uranium are<br><br>$(i)$ <br> $U-235$<br>$(ii)$ <br> $U-236$<br>$(iii)$ <br> $U-238$<br>$(iv)$ <br> $U-232$<br>
Question 13 :
Back isotopes of hydrogen has ________ proton. Fill in the blank.
Question 14 :
An atom contains 12 protons, 12 electrons, and 13 neutrons.<br>Which of the following combinations of particles is an isotope of that atom?<br>
Question 15 :
Identify the element if it has mass number 14 and 8 neutrons.<br/>
Question 16 :
On bombarding $_{8}O^{16}$ with deuterons, the nuclei of the product formed will be:
Question 17 :
Which of the following has an equal number of neutrons and protons?
Question 20 :
The atomic mass of a hypothetical element X is 33.42 amu. A 27.22 g sample of X combines with 84.10 g of another hypothetical element Y to form the compound XY. The atomic mass of Y is:
Question 21 :
The relative atomic masses of the elements are usually not whole numbers because:
Question 22 :
How many neutrons does the most common isotope of hydrogen have?
Question 23 :
A beam of $16 MeV$ deutrons from a cyclotron falls on a copper block. The beam is equivalent to a current of 15$\mu A$. At what rate do the deutrons strike the block?