The elements of a group in the periodic table-

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Q: 51 (CDS-I/2012)
The elements of a group in the periodic table-—

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,43,31,43,22,4,5

keywords: 

{'isotopes': [0, 0, 3, 6], 'consecutive atomic numbers': [0, 0, 0, 1], 'elements': [0, 0, 2, 5], 'periodic': [0, 0, 0, 1], 'isobars': [3, 1, 4, 4], 'group': [0, 1, 0, 0]}

The correct answer is option 1: The elements of a group in the periodic table have similar chemical properties.

Explanation:

In the periodic table, elements are organized into groups or columns based on similar chemical properties. Each group consists of elements that have the same number of valence electrons, which are the electrons in the outermost energy level of an atom. Valence electrons play a crucial role in determining an element`s chemical behavior.

Elements within the same group share similar properties because they have the same number of valence electrons. This similarity allows them to form similar types of chemical bonds and participate in similar chemical reactions. For example, elements in Group 1 (the alkali metals) all have one valence electron and are highly reactive metals. Similarly, elements in Group 17 (the halogens) all have seven valence electrons and are highly reactive nonmetals.

Therefore, option 1 is correct because elements in a group in the periodic table exhibit similar chemical properties due to having the same number of valence electrons.