Download App

Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties2 Marks
Question
Define:
  1. Metallic radius.
  2. Van der Waals' radius.
✓

Answer

  1. Metallic radius is half the distance between centres of nuclei of two atoms of metal held together by metallic bond.
  2. Van der Waals' radius is half of the distance between centres of nuclei of two atoms held by weak van der Waals' forces of attraction.

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 Classification of Elements and Periodicity in Properties→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

Glycine is an a-amino acid. It exists in the form of Zwitter ion as +NH3CH2COO-
Write the formula of its
  1. Conjugate acid.
  2. Conjugate base.
→
  1. How do the electronic configurations of the elements with Z = 107 to 109 differ from one another?
  2. Rn (Z = 86) is the last noble gas discovered. Predict what will be the atomic number of the next noble gas to be discovered. Write its symbol.
→
Write stock notation of MnO2 and AuCl3.
→
Consider the elements:

Cs, Ne, I and F

Identify the element that exhibits both positive and negative oxidation states.

→
Explain the characteristics of canal rays (positively charged particles).
→
What happens when:
  1. Bromoethane is treated with zinc and hydrochloric acid?
  2. Hydrogen is passed into 2-bromopropane in the presence of palladium?
→
The electron gain enthalpy of bromine is 3.36eV. How much energy in kcal is released when 8g of bromine is completely converted to Br- ions in the gaseous state? (1eV = 23.06kcal mol-1).
→
In each of the following pairs of salts, which one is more stable?
1. Ferrous and ferric salts
2. Cuprous and cupric salts
→
Calculate the mass percent of calcium, phosphorus and oxygen in calcium phosphate Ca3(PO4)2.
→
Calculate the energy required for the process
$
He^{+}(g) \rightarrow He^{2+}(g)+e^{-}
$
The ionization energy for the $H$ atom in the ground state is $2.18 \times 10^{-18} J atom ^{-1}$.
→