Question

Why do all the elements of the (a) same group have similar properties, (b) same period have different properties?

Answer 1

Step 1:

Properties of elements:

Elements in the periodic table are classified on their various properties. The properties are listed as:

*Electronegativity

*Electron affinity

*Ionization energy

*Atomic radius

*Metallic character

Step 2:

(a) the elements belonging to the same group have similar properties because every element has the same number of valence electrons in its valence shell.

(b) the elements belonging to the same period have different properties because every element has a different number of valence electrons in its valence shell.