As compared to K, Na has

• higher ionization potential

• lower melting point

• lower electronegativity

• larger atomic radius

Alkali and alkaline earth metals

• Smaller electronegativity of alkali metals

• The smaller ionic radius of these metals

• De-Excitation of electrons from higher energy levels to low energy level

• Excitation of electrons from low energy levels to higher energy levels

Which one of the following alkali metals forms only normal oxide when it reacts with O2?

• Lithium

• Sodium

• Potassium

• Rubidium

Lithium and magnesium are …………………metals.

• sponge

• hard

• soft

• smooth

Lithium has a diagonal relationship with …………..

• magnesium

• sodium

• aluminum

• neon

Which one pair has the same oxidation state of ‘Cu’?

In potassium magnate the oxidation number of Mn is

• +2

• +4

• +6

• +7

First transition series consist of _________Elements

• 20

• 40

• 10

• 8

Which one of the following is a non-typical transition element

• Zn

• Mn

• Ni

• Ti

Which electronic configuration represents the tri-positive cation with atomic number 23