16.03.2020

which metal has the highest melting point?

. 4

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Chemistry
Step-by-step answer
P Answered by PhD

strontium thats the alternative answer

Chemistry
Step-by-step answer
P Answered by PhD

strontium thats the alternative answer

Physics
Step-by-step answer
P Answered by PhD

Explanation:

It is given that, the metal with the highest melting temperature is tungsten which melts at around 3400 K, T = 3400 K

We need to find the wavelength of the peak of the black body distribution for this temperature. It can be calculated using Wein's displacement law as :

\lambda\times T=k

k is the constant, k=2.89\times 10^{-3}\ m.k

\lambda=\dfrac{k}{T}

\lambda=\dfrac{2.89\times 10^{-3}\ m.k}{3400\ k}

\lambda=8.5\times 10^{-7}\ m

or

\lambda=850\ nm

The wavelength of infrared is from 700 nm to 1 mm. So, the lies in infrared region of the spectrum. Hence, this is the required solution.

Physics
Step-by-step answer
P Answered by PhD

Explanation:

It is given that, the metal with the highest melting temperature is tungsten which melts at around 3400 K, T = 3400 K

We need to find the wavelength of the peak of the black body distribution for this temperature. It can be calculated using Wein's displacement law as :

\lambda\times T=k

k is the constant, k=2.89\times 10^{-3}\ m.k

\lambda=\dfrac{k}{T}

\lambda=\dfrac{2.89\times 10^{-3}\ m.k}{3400\ k}

\lambda=8.5\times 10^{-7}\ m

or

\lambda=850\ nm

The wavelength of infrared is from 700 nm to 1 mm. So, the lies in infrared region of the spectrum. Hence, this is the required solution.

Chemistry
Step-by-step answer
P Answered by PhD

The metal with the highest melting point is aluminium which melts at 660.3°C.

Magnesium melts at 639°C , sodium at 98°C and potassium at 64°C.

The melting point is the temperature at which a substance  begins to melt. As a solid substance is heated, or absorbs heat from the environment,  the molecules that make up that substance begin to gain more (heat) energy, enough to overcome the intermolecular forces that in the first place have been holding them together in a sort of rigid fashion.

This energy enables the molecules  to break free of their intermolecular forces and thus the solid's lattice structure changes and the solid becomes liquid.

 


Chemistry
Step-by-step answer
P Answered by PhD

The metal with the highest melting point is aluminium which melts at 660.3°C.

Magnesium melts at 639°C , sodium at 98°C and potassium at 64°C.

The melting point is the temperature at which a substance  begins to melt. As a solid substance is heated, or absorbs heat from the environment,  the molecules that make up that substance begin to gain more (heat) energy, enough to overcome the intermolecular forces that in the first place have been holding them together in a sort of rigid fashion.

This energy enables the molecules  to break free of their intermolecular forces and thus the solid's lattice structure changes and the solid becomes liquid.

 


Chemistry
Step-by-step answer
P Answered by PhD

15. Metallic bonds form between?

Answer 15 : cations and electrons.

16. What is the formula for lithium nitride?

Answer 16 : Li₃N

17. Which type of solid is likely to be the best conductor of electricity?

Answer 18 : metal element.

18. When an atom gains an electron, it forms a?

Answer 18 : an anion.

19. Mg₃P₂ - Which element is the cation?

Answer 19 : Mg⁺⁺

20. Which of the following has the highest melting point?

Answer 20 : metallic compound.

21. What statement is true about carbon-12 and carbon-14?

Answer 21 : They are isotopes of carbon.

22. What is the name of the phase change that occurs when a substance changes from a gas to a liquid?

Answer 22 : Condensation

Hope this helps!

Chemistry
Step-by-step answer
P Answered by PhD

15. Metallic bonds form between?

Answer 15 : cations and electrons.

16. What is the formula for lithium nitride?

Answer 16 : Li₃N

17. Which type of solid is likely to be the best conductor of electricity?

Answer 18 : metal element.

18. When an atom gains an electron, it forms a?

Answer 18 : an anion.

19. Mg₃P₂ - Which element is the cation?

Answer 19 : Mg⁺⁺

20. Which of the following has the highest melting point?

Answer 20 : metallic compound.

21. What statement is true about carbon-12 and carbon-14?

Answer 21 : They are isotopes of carbon.

22. What is the name of the phase change that occurs when a substance changes from a gas to a liquid?

Answer 22 : Condensation

Hope this helps!

Chemistry
Step-by-step answer
P Answered by PhD

B -Network solids

Ionic solids are held by positive and negative charged ions bonded by electrostatic forces. The electrostatic force is much stronger than dipole–dipole interactions, London dispersion forces, hydrogen bonding.

Molecular solids are held by dipole–dipole interactions, London dispersion forces, or hydrogen bonds. Benzene is an example of this. These inter-molecular force are much weaker than electrostatic force.

The metallic bonds are much weaker than electrostatic force. Similarly, in non-metallic solids the atoms are held by covalent bonds. These covalent bonds are weaker than the electrostatic force.

Thus we can conclude that electrostatic force is the strongest when compared to  dipole–dipole interactions, London dispersion forces, hydrogen bonding,covalent and metallic bonds. Thus ionic solids will have the highest melting point as more energy is required to break the ionic bonds as this is the strongest bond compared to the other bonds.

Chemistry
Step-by-step answer
P Answered by PhD

B -Network solids

Ionic solids are held by positive and negative charged ions bonded by electrostatic forces. The electrostatic force is much stronger than dipole–dipole interactions, London dispersion forces, hydrogen bonding.

Molecular solids are held by dipole–dipole interactions, London dispersion forces, or hydrogen bonds. Benzene is an example of this. These inter-molecular force are much weaker than electrostatic force.

The metallic bonds are much weaker than electrostatic force. Similarly, in non-metallic solids the atoms are held by covalent bonds. These covalent bonds are weaker than the electrostatic force.

Thus we can conclude that electrostatic force is the strongest when compared to  dipole–dipole interactions, London dispersion forces, hydrogen bonding,covalent and metallic bonds. Thus ionic solids will have the highest melting point as more energy is required to break the ionic bonds as this is the strongest bond compared to the other bonds.

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