s-Block ElementsHard
Question
Alkali metals possess metallic lustre when freshly cut because :
Options
A.they have a hard surface and light is reflected back.
B.their crystal structure contains ordered arrangement of constituent atoms.
C.contain loosely bound electrons which absorb the photons and then re-emit.
D.they are obtained from the minerals on which light has been falling for years.
Solution
The alkali metal atoms have the largest size in a particular period of the periodic table and thus they contain loosely bound electrons which absorb the photons and then re-emit it and producing metallic lustre.
Create a free account to view solution
View Solution FreeMore s-Block Elements Questions
Which of the following has the highest melting point?...The principal products obtained on heating iodine with concentrated caustic soda solution is :...The set representing the correct order of first ionisation potential is :...CaCl2 + H2SO4 CaSO4.2H2O (r) (s) Which of the following option describes, the products, reactants and the reaction condi...Among the following components of cement which is present in highest amount ?...