Question

Which were imported to poompuhar by sea route and which was procured through the land routen

Answer 1

Part (b)

1. Periodic Table, Periodic Properties and Variations of Properties

Dr. S. P. Singh - Chemistry 10

Textbook Solutions

Part (b)

1. Periodic Table, Periodic Properties and Variations of Properties, page 17

Tip

Atomic size is defined as the distance between the center of the nucleus of an atom and its outermost shell it the diminutive distance between the atom's nuclei and the outermost shell of the atom.

Explanation

Metals are those elements that tend to lose their valence electrons (electrons present in the valence shell) and form a cation.

The metallic character, a periodic property, of an element depends upon:

Atomic size and nuclear charge

As we move across from left to right in a period, the inward nuclear pull increases due to the gradual increase in atomic number, thus the elements cannot lose electrons easily.

So, the metallic character decreases across a period, moving from left to right.

As we move down the group in a periodic table, the atomic size as well as the nuclear charge increases. The effect of increased atomic size is greater than the increased nuclear charge. Thus, the tendency to lose electrons increases leading to the increase in the metallic character.

So, the metallic character increases as we go down the group.

Li<Na<K<Rb<Cs is the sequence of elements in increasing metallic character.