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Classification of Elements & Periodicity Practice Questions - DPP for NEET

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FAQs on Classification of Elements & Periodicity Practice Questions - DPP for NEET

1. How are elements classified in the periodic table?
Ans. Elements in the periodic table are classified based on their atomic number, electron configuration, and chemical properties. They are arranged in periods (rows) and groups (columns) based on similar characteristics.
2. What is the significance of the periodic table in chemistry?
Ans. The periodic table is a fundamental tool in chemistry as it provides a systematic way to organize and study elements. It allows scientists to predict an element's properties, understand trends in reactivity and atomic structure, and determine the relationships between different elements.
3. What are periods and groups in the periodic table?
Ans. Periods in the periodic table are the horizontal rows, numbered from 1 to 7. They indicate the number of electron shells an element has. Groups, on the other hand, are the vertical columns, numbered from 1 to 18. Elements within the same group share similar chemical properties due to the same number of valence electrons.
4. How does the atomic number determine an element's position in the periodic table?
Ans. The atomic number of an element represents the number of protons in its nucleus. In the periodic table, elements are arranged in increasing order of atomic number. This arrangement ensures that elements with similar chemical properties are grouped together and helps in identifying trends in properties across the table.
5. What are some periodic trends observed in the periodic table?
Ans. Some periodic trends include atomic radius, ionization energy, electronegativity, and metallic character. Atomic radius generally decreases across a period and increases down a group. Ionization energy and electronegativity tend to increase across a period and decrease down a group. Metallic character follows the opposite trend, increasing down a group and decreasing across a period.
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