Download App

Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
MCQ
The difference between the mass number and the atomic number gives the _______.
  • A
    Number of neutrons.
  • B
    Number of electrons.
  • C
    Charge of an element.
  • D
    Number of protons.
✓

Answer

  1. Number of neutrons.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Structure of Atom→Structure of Atom — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

The temperature at the bottom of a high water fall is higher than that at the top because:
→
For a reaction at ${25\,^o}C$ enthalpy change and entropy changes are $ - 11.7 \times {10^3}\,J\,mo{l^{ - 1}}$ and $ - 105\,J\,mo{l^{ - 1}}\,{K^{ - 1}}$ respectively. What is the Gibbs free energy .....$kJ$
→
At $600\,K , 2\,mol$ of $NO$ are mixed with $1 mol$ of $O _{2}$.

$2 NO _{( g )}+ O _{2}( g ) \rightleftarrows 2 NO _{2}( g )$

The reaction occurring as above comes to equilibrium under a total pressure of 1 atom. Analysis of the system shows that $0.6 mol$ of oxygen are present at equilibrium. The equilibrium constant for the reaction is $.........$(Nearest integer).

→
The tendency of $BF_3, BCl_3$ and $BBr_3$ to behave as Lewis acid decreases in the sequence
→
Which among the following factors is the most important in making fluorine, the  strongest oxidising halogen ?
→
$pH + pOH$ equal to
→
Which of the following statements is correct about heat of combustion
→
For $2\ moles$ of $He$ (ideal gas), find the work done in a process where it is heated from $200\ K$ to $400\ K$ such that the enthalpy of  the gas varies as : $H = 10\ V^2$
→
For the reaction $AB(g)\, \rightleftharpoons \,A(g) + B(g),\,AB$  is  $33.3\%$ dissociated at a total equilibrium pressure of $P.$ Therefore, $P$ is correctly related to $K_p$ by which of the following option
→
Find the value $\Delta H_f^o[NH_3(g)]$  if $\Delta H_r$  for the following reaction is $-\,183.6\,\,kJ$  per mole of  $N_2(g)$ 

$\frac{1}{2}\,{N_2}(g)\,\, + \,\,\frac{3}{2}{H_2}(g)\, \to \,N{H_3}(g)$ ......$kJ/mol$

→