The atomic numbers of two elements A and B are 11 and 12 respectively. Which element exhibits highest metallic property ? Why ? Write the molecular formula of the compounds formed when these elements combine with the element 'Z' having atomic number 8.

The atomic numbers of two elements A and B are 11 and 12 respectively.

1.	The atomic numbers of two elements A and B are 11 and 12 respectively. Which element exhibits highest metallic property ? Why ? Write the molecular formula of the compounds formed when these elements combine with the element 'Z' having atomic number 8.
Answer» Solution :A Because as the effective NUCLEAR charge ACTING on the valence shell electrons increases across a period, the TENDENCY to lose electrons will DECREASE.