Download App

PART - 1 CH - 3 Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryPART - 1 CH - 3 Classification of Elements and Periodicity in Properties2 Marks
Question
What does atomic radius and ionic radius really mean to you?
✓

Answer

Atomic Radii: The distance between nucleus and last electron present in outermost shell is known as atomic radii.
In covalent molecules, half of the distance between the nuclei of two identical non-metallic atoms joined by single bond is equal to atomic radius.
Ionic Radii: This tells the size of the ion. The distance between nucleus of an ion and its last electron. upto which the ion has influence in ionic bond is called ionic radius.

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 "2 Marks Questions" from PART - 1 CH - 3 Classification of Elements and Periodicity in Properties→PART - 1 CH - 3 Classification of Elements and Periodicity in Properties — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Br2 + 2Cl- → Cl2 + 2Br-, will this reaction take place or not?
$\text{E}^0_\frac{\text{Br}_2}{\text{Br}^-}=+1.09\text{V}$
$\text{E}^0_\frac{\text{Cl}_2}{\text{Cl}^-}=+1.36\text{V}$
→
Write the electronic configuration of ${ }_9 F^{19},{ }_{16} S^{32}$ and ${ }_{18} Ar ^{38}$ and then point out the element with
i. maximum nuclear charge.
ii. minimum number of neutrons.
iii. maximum number of unpaired electrons.
→
A sample of drinking water was found to be severely contaminated with chloroform, CHCl3, supposed to be carcinogenic in nature. The level of contamination was 15ppm (by mass).
Express this in percent by mass.
→
In three moles of ethane (C2H6), calculate the following:
Number of moles of carbon atoms.
→
Write the structure and IUPAC names of different structural isomers of alkenes corresponding to $C _5 H _{10}$.
→
While analyzing an organic compound in Dumas' method, 0.30 grams of organic compound is obtained at 300 K temperature and 756 mm . At pressure 32.4 mm , nitrogen is obtained. Find percentage of nitrogen in compound.
→
Predict the position of the element in the periodic table satisfying the electronic configuration (n - 1)d1ns2 for n = 4. How many valence electrons does it here?
→
How many o and it bonds are present in each of the following molecules?
  1. $\text{CH}_3\text{CH}_2\text{C}\equiv\text{N}$
  2. $\text{CH}_3-\text{CH}=\text{CH}-\text{CH}_2-\text{C}\equiv\text{CH}$
  3. $\text{CH}_2=\text{C}=\text{CH}_2$
→
Explain about solubility of ionic compounds.
→
  1. Explain the structure of $\text{CO}^{2-}_3$ ion in terms of resonance.
  2. Which out of NH3 and NF3 has higher dipole moment and why?
→