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The electropositive character of alkali ...

The electropositive character of alkali metals decreases with an increase in atomic number. True or False

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To determine whether the statement "The electropositive character of alkali metals decreases with an increase in atomic number" is true or false, we can analyze the properties of alkali metals systematically. ### Step-by-Step Solution: 1. **Identify Alkali Metals**: - The alkali metals are located in Group 1 of the periodic table and include Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), and Cesium (Cs). 2. **Understand Electropositive Character**: - Electropositive character refers to the ability of an element to lose electrons and form positive ions. The stronger the tendency to lose electrons, the more electropositive the element is. 3. **Examine Ionization Enthalpy**: - Ionization enthalpy is the energy required to remove an electron from an atom. For alkali metals, this value decreases as we move down the group from Li to Cs. 4. **Trend in Ionization Enthalpy**: - As we move down the group, the atomic size increases, and the outermost electron is further from the nucleus. This results in a decrease in ionization enthalpy. 5. **Relate Ionization Enthalpy to Electropositive Character**: - Since the ionization enthalpy decreases, the tendency of alkali metals to lose their outermost electron increases. Therefore, their electropositive character increases as we move down the group. 6. **Conclusion**: - The statement claims that the electropositive character decreases with an increase in atomic number. However, we have established that the electropositive character actually increases as we move down the group (i.e., with an increase in atomic number). Thus, the statement is **False**. ### Final Answer: **False** - The electropositive character of alkali metals increases with an increase in atomic number.
To determine whether the statement "The electropositive character of alkali metals decreases with an increase in atomic number" is true or false, we can analyze the properties of alkali metals systematically. ### Step-by-Step Solution: 1. **Identify Alkali Metals**: - The alkali metals are located in Group 1 of the periodic table and include Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), and Cesium (Cs). 2. **Understand Electropositive Character**: ...
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