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Periodic Classification & Chemical Bonding and S-Block Elements (Old NCERT) Video Lecture | Crash Course for NEET
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FAQs on Periodic Classification & Chemical Bonding and S-Block Elements (Old NCERT) Video Lecture - Crash Course for NEET
| 1. What is the periodic classification of elements? |  |
Ans. The periodic classification of elements is the arrangement of elements in the periodic table based on their atomic number, electron configuration, and recurring chemical properties. This classification allows us to understand the trends and patterns in the properties of elements and facilitates the prediction of their behavior.
| 2. How are elements grouped in the periodic table? | |
Ans. Elements are grouped in the periodic table based on their similar chemical properties and electronic configurations. The table is divided into several blocks, including the s-block, p-block, d-block, and f-block, each representing different energy levels. Elements in the same group or column have similar outer electron configurations, while elements in the same period or row have the same number of electron shells.
| 3. What is chemical bonding? | |
Ans. Chemical bonding refers to the process of joining two or more atoms together to form molecules or compounds. It involves the sharing, transferring, or redistribution of electrons between atoms to achieve a stable configuration. The most common types of chemical bonds are ionic bonds (electrostatic attraction between ions), covalent bonds (sharing of electrons), and metallic bonds (delocalized electrons).
| 4. What are the characteristics of s-block elements? | |
Ans. S-block elements are located in the first two groups of the periodic table, including the alkali metals (Group 1) and alkaline earth metals (Group 2). These elements have their outermost electron(s) in the s-orbital. They are highly reactive metals, tend to form cations, and have low ionization energies and electronegativities. S-block elements are known for their strong reducing properties and play essential roles in various biological processes.
| 5. How do s-block elements participate in chemical reactions? | |
Ans. S-block elements readily participate in chemical reactions due to their low ionization energies and the presence of loosely held outermost electrons. Alkali metals (Group 1) readily lose their single valence electron to form +1 cations, while alkaline earth metals (Group 2) lose two valence electrons to form +2 cations. These cations then interact with other elements or compounds to form ionic compounds or participate in redox reactions.
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Nov 26, 2024 Last updated |
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