Usually the transition metals. (Tungsten has the highest melting point of all the metals.)
positive ions have high melting points
All metals have different melting points but they are all high
One substance that has a high melting point is diamond.
Chromium has a high melting point of 1,857°C (3,375°F) making it a refractory metal.
That depends on the solid: ice has a very low melting point, lard and butter have low melting points, chocolate has a relatively low melting point, wax has an intermediate melting point, lead has a high melting point, iron has a very high melting point, tungsten has an extremely high melting point.
it has a low melting point
Yes, it has a melting point of 1683 Kelvin.
"High" is kind of subjective, but its melting point is 500oC, so I'd say that's pretty high.
They have low melting points and high reactivity.
Uranium has a high melting point of 2,075°C (3,767°F), which is relatively high compared to many other metals. This high melting point makes uranium suitable for use in nuclear power reactors, where it needs to withstand high temperatures.
Barium oxide has a high melting point of around 1,923 degrees Celsius. This is typical for many metal oxides, as they tend to have high melting points due to the strong ionic bonds between the metal and oxygen atoms.
Materials with a high melting index typically include metals such as tungsten, molybdenum, and tantalum, which have high melting points and are often used in high-temperature applications. Other materials like certain polymers, such as high-density polyethylene (HDPE) and polypropylene, also exhibit high melting indices, indicating they can flow easily when heated. Additionally, ceramics and certain composites can have high melting indices, making them suitable for extreme thermal environments.