Question

ii) Sodium is more metallic than aluminium. give scientific reason ​

Answer 1

Answer:

The effective nuclear charge is more on aluminium than sodium and thus aluminium has a smaller size.Thus, removal of electrons from aluminium requires higher energy than sodium i.e. ionization energy of aluminium is higher than sodium. This makes sodium more metallic than aluminium. sodium is more metallic than aluminium as it will lose one electron readily hence owns metallic character.

Answer 2

Sodium element is more metallic than aluminum element because of the below-given reason:

• Any element's metallic properties are determined by how readily it can release its valence electrons to achieve stability.
• The more electrons in the outer shell, the more difficult it is for an element to give off these valence electrons, and the more energy necessary to do so, making it less metallic.
• To achieve stability, the sodium atom just needs to lose one electron from its outer third shell. It is simple for it since its atomic size is larger and its nucleus imposes a lower attraction force to electrons.
• To achieve stability, the aluminum element must give off three valence electrons, which necessitates more energy and makes it more difficult. As a result, it has fewer metallic characteristics.
• Hence,  due to its inclination to shed valence electrons easily sodium element is more metallic than aluminum element.