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A very good Periodic Table. See the Web Links to the left of this answer for a periodic table with melting and boiling points, and other tables with the melting and boiling points of the elements. Go to this awesome site: HTTP://WWW.MATWEB.COM and find most any comercially-available material (all metals, plastics & ceramics). You can sort by property, which makes it easy to find the best material for your application.
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Alloys are used in electrical heating devices rather than pure metals. Give reason.?
Alloys are used rather than pure metals in electrical heating devices since they have low electrical conductivity and also a low melting point. Usually the alloys don't have a single melting point; they have a range of melting points. The temperature at which melting begins is called the SOLIDUS and the temperature at which melting is complete is called the LIQUIDUS.Student
What are the characteristics of ceramics?
Physical properties means the behavior of materials in response to physical forces other than mechanical, such as; Volumetric, thermal, electric and electrochemical properties. Most Ceramics are lighter than metals but heavier than polymers. Most ceramics have a higher melting point than most metals as it is that some ceramics such as China can with stand high temperatures to about 1200 degrees centigrade. Ceramics also has lower Electrical and Thermal Conductivity than most metals but the range of value is greater in ceramics permitting some ceramics to be used as insulators, for example Porcelain insulators and others as conductors like Lithium-ion conducting glass-ceramics and oxide ceramics. Thermal expansion is another physical property of ceramics, Ceramic thermal expansion coefficients are less than those of metals but effects are more damaging in ceramics bringing about cracks and other failures(Thermal shock and thermal cracking) as for ceramic materials with relatively high thermal expansion and low thermal conductivity however there is glass ceramics that has low thermal expansion thus resisting thermal shock and thermal cracking, for example Pyrex glass ceramics. Thus the physical properties being but not limited to permeability, elasticity, considerable strength, hardness, brittleness, resistance to chemical attack and thermal shock.
What is the difference between activity diagram and sequence diagram?
Activity diagram shows the work flow from start point to the end point detailing many decision points. Sequence shows detail flow of specific use case and it also shows interaction between actors, system and system components
What are linear points?
Linear points are any point on a line. There can be an infinite points on a line. Linear points are most commonly discussed in Algebra and Geometry classes.
What is the difference between metallic and non-metallic cable?
There is a big difference between Non-metallic minerals and metallic minerals.Metallic minerals are composed primarily of metallic elements and have a metallic lustre and other properties, such as the ability to conduct electricity. Non-metallic minerals do not have these characteristics
Do metalloids have a higher melting point then metals?
Metalloids typically have higher melting points than non-metal elements but lower melting points than most metals. This is because metalloids have properties that are intermediate between metals and non-metals, giving them melting points that fall between the two categories.
All metals are hard and have high melting points?
Not all metals are hard, as some metals like gold and lead are relatively soft. Additionally, while many metals have high melting points, some metals like mercury have low melting points. The properties of metals can vary widely depending on the specific metal in question.
What is the Melting points of the alkali metals?
sodium
What have high melting and boiling points?
metals
Do group one metals have a high melting point?
No, group one metals such as lithium, sodium, and potassium have relatively low melting points. They are soft and have low melting points due to the weak metallic bonding between their atoms.
Which all metals have low melting and boiling points?
Some examples of metals with low melting and boiling points include mercury, cesium, and gallium. These metals have melting and boiling points significantly lower than traditional metals like iron and copper.
Does non metals have low melting points?
Yes.
Do metals have high melting or points?
Metals have high melting points. Metals lack ionic bonding and possess metallic bonds that are so strong that it takes so much heat to break them apart.
Explain why there is this pattern in melting points for francium?
The melting point of francium is not measured, only supposed by comparison with the melting points of the other alkali metals.
Generally melting points of metals are high name two metals whose melting points are so low that they would melteven when kept in hand?
Galium n Mercury
Do metalloids have high melting points?
Metalloids have melting points that are generally lower than those of metals but higher than those of nonmetals. Their melting points can vary depending on the specific element and its atomic structure.
Melting points of alkali metals?
The melting points of alkali metals decrease down the group on the periodic table. Lithium has the highest melting point at 180.5°C, while cesium has the lowest at 28.5°C. This trend is due to the decreasing strength of metallic bonds as the atomic size increases down the group.
