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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. What are the main groups or classifications of elements in the periodic table?
Ans. The main groups or classifications of elements in the periodic table are alkali metals, alkaline earth metals, transition metals, halogens, noble gases, and metalloids.
2. How do alkali metals differ from alkaline earth metals?
Ans. Alkali metals and alkaline earth metals differ in terms of their properties. Alkali metals are highly reactive, have a single valence electron, and are soft and easily cut with a knife. Alkaline earth metals are also reactive but less so than alkali metals, have two valence electrons, and are harder and denser.
3. Why are noble gases called "noble"?
Ans. Noble gases are called "noble" because they were once believed to be chemically inert or unreactive due to their full valence electron shells. This made them similar to the noble or aristocratic class of society, who were also seen as unreactive or uninvolved in common affairs.
4. What are metalloids and why are they unique?
Ans. Metalloids are elements that have properties intermediate between metals and non-metals. They exhibit characteristics of both, such as being semi-conductors of electricity and having varying degrees of metallic and non-metallic properties. This makes them unique and useful in various applications, such as in electronics.
5. What is the significance of periodicity in the classification of elements?
Ans. Periodicity refers to the repeating pattern of properties observed in the elements when arranged in increasing atomic number. The periodic table organizes elements based on their atomic structure and allows for the prediction of trends in properties such as atomic radius, electronegativity, and ionization energy. This helps in understanding and studying the behavior of elements and their compounds.
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