Atomic number of elements represent - Vidyadip

MCQ

Atomic number of elements represent

✓
Number of protons in the nucleus
B
Number of neutrons in the nucleus
C
Number of protons and neutrons in nucleus
D
The valency of an element

✓

Answer

Correct option: A.

Number of protons in the nucleus

a
Atomic number of an element represents the number of protons in the nucleus. It is also equal to the number of electrons in neutral atom. The number of neutrons is equal to the difference between mass number and atomic number.

For example, for ${ }_{17}^{37} Cl$, the atomic number is $17$, the mass number is $37$ , there are $17$ , electrons, $17$ protons and $37-17=20$ 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

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

$15$ moles of ${H_2}$ and $5.2$ moles of ${I_2}$ are mixed and allowed to attain equilibrium at ${500\,^o}C$. At equilibrium, the concentration of $HI$ is found to be $10$ moles. The equilbrium constant for the formation of $HI$ is

$\begin{matrix}
\,\,\,Br\,\,\,Br \\
|\,\,\,\,\,\,\,\,| \\
C{{H}_{3}}-C-C-C{{H}_{3}} \\
|\,\,\,\,\,\,\,\,| \\
\,\,Br\,\,\,Br \\
\end{matrix}\xrightarrow{xNaN{{H}_{2}}}\xrightarrow{y\,C{{H}_{3}}I}C{{H}_{3}}-C\equiv C-C\equiv C-C{{H}_{3}}$

$x$ and $y$ mole consumed. Value of $x + y =$

Crystal field stabiliztion energy $(CFSE)$ for high spin $d^4$ (tetrahedral complex) is $\Delta t = CFSE$ for tetrahedral

Which of the following represents the electronic configuration of a transition element

A liquid compound ($x$) can be purified by steam distillation only if it is

Choose the correct order for given property
$(M.P. \to Melting Point ; S \to Solubility)$

"The properties of the elements are periodic function of their atomic numbers." The statement was given by :-

When petroleum is heated the vapours contain mainly

How many pairs of enantiomers are possible for following complex compound, $[M \,(AB)\, (CD) \,ef]^{n\,±}$ (where $AB,\,CD-$ Unsymmetrical bidentate ligand, $e$, $f-$ monodentate ligands)

Iron carbonyl, $Fe(CO)_5$ is