Atomic number of element ___________ is 19. - Vidyadip

MCQ

Atomic number of element ___________ is 19.

A
Mg
B
K
C
Ar
D
Ca

✓

Answer

K

Explanation:

Atomic number of potassium (K) is 19.

Atomic numbers of Mg, Ar and Ca are 12, 18 and 20 respectively.

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 radius of which ion Is closest to that of $Li^+$ ion?

What happens when naphthalene balls are put inside kerosene

For a certain reaction at $300 \mathrm{~K}, \mathrm{~K}=10$, then $\Delta \mathrm{G}^{\circ}$ for the same reaction is _____________$\times 10^{-1} \mathrm{~kJ} \mathrm{~mol}^{-1}$. (Given $\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ )

Match List $I$ with List $II$

List-$I$ (Elements)	List-$II$(Properties in their respective groups)
$A$ $\mathrm{Cl}, \mathrm{S}$	$I$ Elements with highest electronegativity
$B$ $\mathrm{Ge}, \mathrm{As}$	$II$ Elements with largest atomic size
$C$ $\mathrm{Fr}, \mathrm{Ra}$	$III$ Elements which show properties of both metals and non metal
$D$ $\mathrm{F}, \mathrm{O}$	$IV$ Elements with highest negative electron gain enthalpy

Choose the correct answer from the options given below :

Which of the following pairs have absence of carbocyclic ring in both compounds?

Which of the following are formed on addition reaction of $DCl$ with $3-$methyl$-1-$butene

$2\, g$ of hydrogen combine with $16\, g$ of oxygen to form water and with $6\, g$ of carbon to form methane. In carbon dioxide $12\, g$ of carbon are combined with $32 \,g$ of oxygen. These figures illustrate the law of

Which of the following cannot act as Nucleophile?

The phosphate of a metal has the formula $MHPO_4$ . The formula of its chloride would be

The correct increasing order for bond angles among $\mathrm{BF}_3, \mathrm{PF}_3$ and $\mathrm{C} / \mathrm{F}_3$ is :