Question 2 6 pts Select T/F for each of the following statements regarding Alkal

Question

Question 2 6 pts Select T/F for each of the following statements regarding Alkaline Metals: Beryllium has a higher melting point than aluminum. [Selectl Beryllium metal is toxic. Select Aluminum has a lower density than magnesium. Select] Beryllium and Magnesium are the only alkaline metals that have use as structural materials, since Ca, Sr, Ba, and Ra are susceptible to corrosion in air. Select A significant fraction of magnesium that is produced ends up being casted into highly corrosion resistant parts. [Select 1 Magnesium and calcium are extremely abundant in the earth's crust and are typically found within minerals, rather than in a pure metallic state. [Select)

Explanation / Answer

1. True. Since beryllium has stable valence electronic configuration, as compared to aluminium.

Also experimentally Measured melting point of Be is 1248°C & that of Al is 660°C.

2. True. Beryllium is highly toxic in nature as it causes airborne diseases.

3. False. Since Mg has lower density than Al.

4. True. Since Be & Al has an oxide layer on their surface thus they are reluctant to react with air.

5. True. Due its forming an oxide layer on its surface.

6. True. Since calcium & magnesium are found as minerals in plants cells & earth's crust.

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