The options are Cs, Ca, Be, Li, Mg, Re, K, W, Cr, Fr, Ti The lowest-melting alka

Question

The options are Cs, Ca, Be, Li, Mg, Re, K, W, Cr, Fr, Ti

The lowest-melting alkali metal (and therefore the most susceptible to creep deformation at room temperature). [Choose ] An alkali metal whose +1 ion is very small, making this ion useful for battery applications where the diffusion of positive charge through an electrolyte needs to be fast. [Choose ] An alkali metal whose +1 ion is relatively big compared to typical components of modern silicate glasses. Addition of this metal's +1 ion to such glasses tends to introduce compression on the covalent glas:s network. Choose] A metal that is quite similar to aluminum, but is less ductile and highly susceptible to corrosion [Choose ] A relatively low-density but high-strength metal that has excellent corrosion resistance as a cool solid, but not as a very hot solid or liquid The thermal conductivity of this metal is very low, making it difficult to machine since it doesn't effectively dissipate the heat produced at the cutting tool location. oose The highest melting point pure metal. [Choose ] A metal added to nickel-based superalloys to stabilize the precipitation of the secondary phase (gamma-prime) that strengthens such alloys. [Choose ] A shiny metal that is completely brittle below 300 degrees C oose The pure metal with second-highest melting point. Choose] A metal added to steels to drastically improve their corrosion resistance Choose ] A metal whose oxide is more commonly produced (approximately 60x more by weight). The identity of this oxide mineral is rutile [Choose ] A metal whose primary use is for forming a very hard ceramic carbide for cutting tools and wear resistant coatings oose

Explanation / Answer

1) The lowest melting alkali metal - Francium (Fr)

2) An alkali metal whose +1 ion is very small, making this ion useful for battery application where diffusion of positive charge through an electrolyte needs to be fast- Lithium (Li)

3) An alkali metal whose +1 ion is relatively big compared to typical components of moderate silicate complexes. Addition of these +1 ion to such glasses tends to compress the impression on covalent glass network- potassium (K)

4) A metal that is quite similar to aluminum but is less ductile and highly susceptible to corrosion- Beryillium (Be)

5) A relatively low density but high strength metal that has excellent corrosion resistance as a cool solid but not as a very hot solid or liquid. The thermal conductivity of this metal is very low making difficult to machine since it doesnt effectively dissipate the heat produced at the cutting tool location- Magnesium (Mg)

6) The highest melting point pure metal- Tungsten (Wolfram-W)

7) A metal added to nickel based superalloys to stabilise the precipitation of the secondary phase (gamma prime) that strengths such alloy - Titanium (Ti)

8) A shiny metal that is completely brittle below 300o C - Calcium (Ca)

9) The pure metal with second highest melting point- Rhenium (Re)

10) A metal added to steels to drastically improve their corrosion resistance- Chromium (Cr)

11) A metal whose oxide is more commonly produced (approximately 60% by weight) the identity of this oxide is rutile-Titanium (Ti)

12) A metal whose primary use is or forming a very hard ceramic carbide for cutting tools and wear resistant coatings- Titanium (Ti)

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