Download App

Structure of Atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
MCQ
Atomic number of element $ ........ $ is $19.$
  • A
    $\ce{Mg}$
  • ✓
    $\ce{K}$
  • C
    $\ce{Ar}$
  • D
    $\ce{Ca}$
✓

Answer

Correct option: B.
$\ce{K}$
Atomic number of potassium $\ce{(K)}$ is $19.$
Atomic numbers of $\ce{Mg, Ar}$ and $\ce{Ca}$ 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→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The correct order of electron affinity is
→
A solution of sulphur dioxide in water reacts with ${H_2}S$ precipitating sulphur. Here sulphur dioxide acts as
→
The highest oxidation state of $Mn$ is shown by
→
The solubility of a sparingly soluble salt $A_x B_y$ in water at $25\,^oC = 1.4 \times 10^{-4}\ M$ . The solubility product is $1.1 \times 10^{-11}$ . The values of $x$ and $y$ may be 
→
Which can exist in meso form?
→
In the formation of nitric acid $N_2$​ and $O_2$​ are made to combine. Thus,$N_2 + O_2​⇌ 2NO−$Heat which of the following condition will favour the formation of $NO$?
→
In the titration of $KMnO _{4}$ and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is
→
The functional isomer of ethyl alcohol is
→
Among the following, which one is a wrong statement?
→
The correct order of the increasing ionic character is
→