Question

explain the properties of group and period of modern periodic table​

Answer 1

• Explanation: The vertical columns on the periodic table are called groups or families because of their similar chemical behavior.
• All the members of a family of elements have the same number of valence electrons and similar chemical properties.
• The horizontal rows on the periodic table are called periods.

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Answer 2

Answer:

Explanation:

The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.

So, in these groups, the reactivity decreases as we go from top to bottom. Valence electrons, valency, atomic size, ionization energy, metallic character, electron-positivity, electron-negativity and reactivity are the characteristics of groups.