Download App

Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
MCQ
What is the nucleon number of an atom?
  • A
    The number of neutrons.
  • B
    The number of protons.
  • C
    The total number of protons and neutrons.
  • D
    The total number of protons and electrons.
✓

Answer

  1. The total number of protons and neutrons.

Explanation:

The nucleon number or mass number of an atom, is the total number of protons and neutrons in an atomic nucleus.

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

An ionic bond $P^+ Q^-$ is most likely to be formed when
→
Among the following compounds the one that is polar and has central atom with $s{p^2} - $ hybridization is
→
For the reaction $PCl_5 \to PCl_3 + Cl_2,\Delta H = 75\, KJ \,mol^{-1}$ and $\Delta S = 120\, JK^{-1} \,mol^{-1}$. At which temperature reaction is spontaneous.....$K$
→
Supposing the electron of the $H-$atom is present in the $L-$shell. If it liberates $10.2\,eV,$ what is the energy of the system ? ............. $\mathrm{eV}$
→
The $ pH$ of a soft drink is $3.82$. Its hydrogen ion concentration will be
→
The pH of mixture of $50 mL \frac{ N }{10} NaOH$ and 10 ml $\frac{ N }{2} H _2 SO _4$ is :
→
Boric acid is an acid because its molecule 
→
The bond dissociation energies of $H _2, Cl _2$ and HCl are 104,58 and $103 kcal mol ^{-1}$ respectively. The enthalpy of formation of HCl would be
→
Calculate the heat produced in $kJ$ when $280\, g\, CaO$ is completely converted to  $CaCO_3$ by reaction with $CO_2$ at $27\,^oC$ and at constant volume :- 

(Given) $\Delta H^o_f (CaCO_3,s) = -1207 \, \frac{kJ}{mol}$

$\Delta H^o_f \,(CaO,s) = -635 \,kJ/mol$

$\Delta H^o_f \,(CO_2.g) = -394 \,kJ/mol$

→
Which of the set of species have same hybridisation state but different shapes
→