One of them is not an alkali metal, Mark it.
Correct answer: D. Radium
- A. Francium
- B. Cesium
- C. Rubidium
- D. Radium
Explanation
Among the options provided, only Radium is not an alkali metal. Alkali metals are located in the first column of the periodic table, including elements like lithium, sodium, potassium, rubidium, cesium, and francium. Radium, however, is classified as an alkaline earth metal, positioned in the second column of the periodic table. This distinction places Radium outside the alkali metal group, making it the correct answer.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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