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Worksheet about block elements 2 | ||
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| Subject: Chemistry | ||
| 10th Grade | ||
| Term 1 | ||
| Year: 2023/2024 | ||
| Size: 367.4KB | ||
| Number of clicks: 82 | ||
| Publish date:November 05, 2023 | ||
| Added by: Eman | ||
| Last download date: 2024-09-11 12:24:46 | ||
| Updated by: Eman9966 on 2023-11-05 05:56:50 | By: theodor P.Dhandayudhapani | |
| File info: In chemistry, the term "block elements" refers to the classification of elements based on the type of atomic orbitals in which their valence (outermost) electrons are located. Specifically, Block 2 elements refer to the elements found in the s-block of the periodic table. The s-block elements are located in the first two groups of the periodic table, Group 1 (alkali metals) and Group 2 (alkaline earth metals). These elements have their valence electrons in the s-orbital, which is the outermost electron shell. Here is a brief description of the s-block elements: 1. Group 1: Alkali Metals - The alkali metals include elements such as lithium (Li), sodium (Na), potassium (K), and so on. - They are highly reactive metals, characterized by their low density and low melting points. - They have a single valence electron in the s-orbital, making them highly reactive and prone to losing that electron to form a +1 ion. - Alkali metals are known for their vigorous reactions with water, the formation of ionic compounds, and their use in various applications such as batteries and fertilizers. 2. Group 2: Alkaline Earth Metals - The alkaline earth metals include elements such as beryllium (Be), magnesium (Mg), calcium (Ca), and so on. - They are also reactive metals but less reactive than alkali metals. - They have two valence electrons in the s-orbital, and they tend to lose these two electrons to form +2 ions. - Alkaline earth metals are known for their high melting points, low densities, and their presence in various minerals and rocks. The s-block elements exhibit similar chemical properties within their respective groups. They are generally metals with low ionization energies, readily forming positive ions. They also have a tendency to react with non-metals to form ionic compounds. The properties of s-block elements are important in various fields of chemistry, including inorganic chemistry, materials science, and biochemistry. Their reactivity and ability to form compounds contribute to their wide range of applications in industry and technology. | ||
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