Question

Arrangement of the elements in order of their increasing atomic numbers removes most of the anomalies of the _________.
Modern periodic law
De Chancourtois periodic table
Mendeleev's periodic table.
Ancient peroidic law
4 ____________is the enthalpy change when one mole of crystal lattice is formed from the isolated gaseous ions.
hydration energy
lattice energy
ionisation energy
gaseous energy
5 _____states that as far as possible in a given atom in the ground state, electrons in the same sub shell will occupy different orbitals and will have parallel spins.
Pauli's exclusion principle
Hund's rule
Gay Lussac's law
Aufbau's principle
6 As the principal quantum number increases, the atomic radius generally ___________.
shrinks
decreases
remains constant
increases
7 What property was used by Mendeleev to classify elements?
atomic number
molar mass
mass number
chemical properties
8 "The properties of elements are periodic functions of their atomic numbers". This is the statement of __________.
Lecoq de Biosbaudr

Answer 1

Arrangement of the elements in order of their increasing atomic numbers removes most of the anomalies of the Mendeleev'speriodic table.
4 Lattice energy is the enthalpy change when one mole of crystal lattice is formed from the isolated
gaseous ions.
5 Hund's rule states that asfar as possible in a given atom in the ground state, electrons in the same sub
shell will occupy different orbitals and will have parallel spins.
6 As the principal quantum number in creases, the atomic radius generally increases.
7 What property was used by Mendeleev to classify elements? mass number
8 "The properties of elements are periodic functions of their atomic numbers". This is the statement of Mendeleev.