MCQ
Nucleons are equal to :
  • A
    Number of electrons in an atom
  • B
    Number of protons in the nucleus
  • C
    Number of neutrons in the nucelus
  • Number of protons and neutrons in the nucleus

Answer

Correct option: D.
Number of protons and neutrons in the nucleus
d
Nucleons are equal to number of protons and neutrons in the nucleus.

eg: If the given atom or isotope is $He _2^4 He _{ Z }^{ A }$

$Z=2$ Number of protons

$A=4$ Number of nucleons

$A - Z =4-2=2$ Number of neutrons

Hence nucleons $=$ number of $[$ protons $+$ 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

Similar questions

The rate of first order reaction is $0.04 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$ at $10$ minutes and $0.03 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$ at $20$ minutes after initiation. Half life of the reaction is ____________minutes. (Given $\log 2=0.3010, \log 3=0.4771)$
Which of the following is not the correct order of inductive effect
The peptide that gives positive ceric ammonium nitrate and carbylamine tests is
Identify the incorrect statement in the following
Assertion :The order of a reaction can have fractional value.

Reason : The order of a reaction cannot be written from balanced equation of a reaction.

Which of the following has longest $C-O$ bond length ? (Free $C-O$ bond length in $CO$ is $1.128\,\mathop A\limits^o .$)
${C_6}{H_6} + C{H_3}Cl\mathop {\xrightarrow{{{\text{anhydrous}}}}}\limits_{AlC{l_3}} {C_6}{H_5}C{H_3} + HCl$  is an example of
The rate constant, the activation energy and the arrhenius parameter of a chemical reaction at ${25\,^o}C$ are $3.0 \times {10^{ - 4}}\,{s^{ - 1}}$, $104.4\,kJ\,mo{l^{ - 1}}$ and $6.0 \times {10^{14}}\,{s^{ - 1}}$ respectively. The value of the rate constant as $T \to \infty $ is
A physician wishes to prepare a buffer solution at $pH = 3.58$ that efficiently resists changes in $pH$ yet contains only small concentration of the buffering agents. Which of the following weak acids together with its sodium salt would be best to use
The bond order and the magnetic characteristics of $CN^-$ are