Select T/F for each of the following statements regarding Alkali Metals: Cesium
ID: 1031427 • Letter: S
Question
Select T/F for each of the following statements regarding Alkali Metals: Cesium metal is useful, from a mechanical view, because it offers an extremely high elastic modulus and melting point. [Select] Lithium is the smallest metal atom within the alkali group. Select Francium is far from abundant so it is essentially priceless and practically impossible to study.[Select] The primary reason that alkali metals are submerged in mineral oil for storage is that the mineral oil changes color when these metals undergo Select ] The outer s1 electrons of alkali metal atoms are very tightly bound to their positive nuclei, rendering these metals chemically inert when compared to other metals.Select1 Unlike other alkali metal atoms, the sole valence electron of a Li atom is not shielded from the nucleus by a filled p shell. Therefore, Li tends to be the least reactive when compared to other alkali metals. Select]Explanation / Answer
1. Caesium has low melting point. This statement 1 is false.
2. True. Since lithium contains only 3 electrons it has a smallest size amongst all alkali metals.
3. True. Since francium is a naturally occurring stable isotope.
4. False. Alkali metals are dipped in mineral oil beacuse they are highly reactive in nature with air or oxygen present around.
5. False. Since alkali metals have only 1 valence electron it loses it very easily to become more stable & this achieve noble gas configuration. Thus they are not chemically inert in nature.
6. True . Since lithium atom doesn't contain any p- shells & also it has smallest size thus it is least reactive as compared to other alkali metals.