Question

The densities of transition metals are greater than the alkali and alkaline earth metals due to:

• A. increase in effective nuclear charge in transition metals
• B. increase in atomic size in transition metals
• C. increase in number of valence electrons in transition metals
• D. increase in number of shells

Answer 1

The correct option is A increase in effective nuclear charge in transition metals

The effective nuclear charge increases in transition metal due to poor shielding of d electrons. Thus their size decreases and as a result their density increases.