[Answer] Which compound has the highest melting point?

Answer: Al2(CO3)
Which compound has the highest melting point?

For most substances melting and freezing points are approximately equal. For example the melting point and freezing point of mercury is 234.32 kelvins (−38.83 °C; −37.89 °F). However certain substances possess differing solid-liquid transition temperatures. For example agar melts at 85 °C (185 °F; 358 K) and solidifies from 31 °C (88 °F; 304 K); such direction dependence is known as hysteresis. The melting point of ice at 1 atmosphere of pressure is very close to 0 °C (32 °F; 273 K); this is also known as the ic…

Individually tantalum and hafnium carbide have the highest melting points among the binary compounds 4 150 K (3 880 °C; 7 010 °F) and 4 201 K (3 928 °C; 7 102 °F) respectively and their “alloy” with a composition Ta 4 HfC 5 is believed to have a melting point of 4 263 K (3 990 °C; 7 214 °F).

Tantalum hafnium carbide – Wikipedia

Melting point – Wikipedia

Neopentane – Wikipedia

Melting point – Wikipedia

In its pure form molybdenum is a silvery-grey metal with a Mohs hardness of 5.5 and a standard atomic weight of 95.95 g/mol. It has a melting point of 2 623 °C (4 753 °F); of the naturally occurring elements only tantalum osmium rhenium tungsten and carbon have higher melting points. It has one of the lowest coefficients of thermal expansion among commercially used metals.

The melting point of thorium oxide is 3300 °C – the highest of all known oxides. Only a few elements (including tungsten and carbon) and a few compounds (including tantalum carbide) have higher melting points. All thorium compounds are radioactive because there are no stable isotopes of thorium.

Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth’s crust occurring only as the decay product of various heavier elements. All of …

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