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How many elememts in the period table?
There are currently 118 known elements in the periodic table.
Metalsnon metals and metalloids located in the period?
In the periodic table, metals are found on the left side, nonmetals on the right side, and metalloids in between. Metals tend to be good conductors of electricity and heat, while nonmetals are poor conductors. Metalloids have properties of both metals and nonmetals. Examples of metals include iron and copper, nonmetals include nitrogen and oxygen, and metalloids include silicon and arsenic.
What group and period is cobalt in?
Name: cobaltSymbol: CoAtomic number: 27Relative atomic mass (Ar): 58.933195 (5)Standard state: solid at 298 KColour: lustrous, metallic, greyish tingeClassification: MetallicGroup in periodic table: 9Period in periodic table: 4
What similar properties do lead and gold have?
Lead and gold are both heavy metals that are dense and malleable. They are relatively unreactive and have high melting points, making them useful in various industrial applications. Additionally, both lead and gold have been used historically for jewelry and decorative purposes due to their lustrous appearance.
Why are alkali metals good heat conductors and electrical conductors?
Short Answer:For all practical purposes, any metal will be both a good conductor of electricity and a good conductor of heat. Normally, the pure form of the alkali metal does conduct electricity and is also a good thermal conductor, both characteristics being a consequence of the conduction electrons in the bulk material.Long Answer:In this case, if we use the physics definition of metal and not the chemistry definition, then a metal is defined as a material that conducts electricity well. These electrical conductors usually have a higher thermal conductivity because the same electrons that are participating in electrical conduction are also participating in thermal conduction. In general terms then, good electrical conductors are good thermal conductors with a few notable exceptions, e.g. diamond.Caveat:In chemistry, a large swath of the period table labels atoms to be metals and this is not actually a proper characterization related electrical or thermal properties. These properties do not depend on the individual atoms but rather these physical properties are only manifested in bulk materials and depend on temperature, composition, crystal or amorphous structure, etc. Some materials, for instance, will change from insulating to conducting under pressure.
How many elememts in the period table?
There are currently 118 known elements in the periodic table.
Ge and Si are used in making semi-conductors Are these two elements in the same group or the same period?
Ge (Germanium) and Si (Silicon) are both from group 14 in the periodic table. They are in the same group but not in the same period. Ge is in period 4, while Si is in period 3.
Is ohm law true for all conductors?
No. It only applies to a very limited range of conductors that are classified as being 'linear' or 'ohmic'. Most materials are 'non-linear' or 'non-ohmic', and these do NOT obey Ohm's Law. Non-linear conductors include tungsten and non-linear devices include diodes. For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage; if it doesn't, then Ohm's Law doesn't apply. Period!
is ohm s law true for all conductors?
No. It only applies to a very limited range of conductors that are classified as being 'linear' or 'ohmic'. Most materials are 'non-linear' or 'non-ohmic', and these do NOT obey Ohm's Law. Non-linear conductors include tungsten and non-linear devices include diodes. For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage; if it doesn't, then Ohm's Law doesn't apply. Period!
6 properties of metals?
Lustrous- they are shiny at room temperature (except for Mercury, as it is a shiny liquid metal)Malleable- metals are able to be withstand pressure via compression (being flattened into sheets) without cracking or rupturing. For example, lead is a highly malleable metal.Ductility- ductility is a material's ability to deformed or change shape without breaking. This is often thought of in the sense of a substance's ability to be molded into wires. For example, steel is a highly ductile metal.High density- by nature, metals have a more compact structure, meaning the atoms within are held closer together. They have smaller atomic radii relative to other elements within their period on the periodic table, due to the fact they have less valence electrons. This means that the valence electrons are going to be more attracted to the protons in the nucleus, thus meaning a stronger bond (less distance) between those electrons and the nucleus.Good heat conductors- due to the more compact nature of metals (high density) and their lattice or symmetrical, orderly structure, the "cloud" of delocalized electrons (electrons being gained or lost between the atoms of that metal and aren't committed to 1 atom) are more able to carry the extra energy being conducted on the metal to other electrons.Good electricity conductors- metals are also good electricity conductors for similar reasons mentioned above under "good heat conductors".
Metalsnon metals and metalloids located in the period?
In the periodic table, metals are found on the left side, nonmetals on the right side, and metalloids in between. Metals tend to be good conductors of electricity and heat, while nonmetals are poor conductors. Metalloids have properties of both metals and nonmetals. Examples of metals include iron and copper, nonmetals include nitrogen and oxygen, and metalloids include silicon and arsenic.
What group and period is cobalt in?
Name: cobaltSymbol: CoAtomic number: 27Relative atomic mass (Ar): 58.933195 (5)Standard state: solid at 298 KColour: lustrous, metallic, greyish tingeClassification: MetallicGroup in periodic table: 9Period in periodic table: 4
Which element in Period 5 of the Periodic Table is a transition element?
Vanadium Niobium Tantalum
Who was the conductor of London's symphony orchestra from 1970 to 2001?
If you are referring to the London Symphony Orchestra (LSO), the answer is that it had several principal conductors during that period: Previn, Abbado, Tilson Thomas, and Davis. If you are referring to another symphony orchestra located in London (it has more than one!) please say which one.
What other role did conductors originally have?
Choral ensembles presumably had conductors long before the orchestra developed. In the early orchestra performances, time was kept by someone in the group, usually the concertmaster, who played as well as kept the players together. As orchestral compositions and operas became more complex, it was less practical for someone who was playing also to lead the ensemble. No one knows for sure who the first person was to stand in front and direct without actually taking an instrumental role, but it happened some time in the mid to late classical period.
What similar properties do lead and gold have?
Lead and gold are both heavy metals that are dense and malleable. They are relatively unreactive and have high melting points, making them useful in various industrial applications. Additionally, both lead and gold have been used historically for jewelry and decorative purposes due to their lustrous appearance.
Why are alkali metals good heat conductors and electrical conductors?
Short Answer:For all practical purposes, any metal will be both a good conductor of electricity and a good conductor of heat. Normally, the pure form of the alkali metal does conduct electricity and is also a good thermal conductor, both characteristics being a consequence of the conduction electrons in the bulk material.Long Answer:In this case, if we use the physics definition of metal and not the chemistry definition, then a metal is defined as a material that conducts electricity well. These electrical conductors usually have a higher thermal conductivity because the same electrons that are participating in electrical conduction are also participating in thermal conduction. In general terms then, good electrical conductors are good thermal conductors with a few notable exceptions, e.g. diamond.Caveat:In chemistry, a large swath of the period table labels atoms to be metals and this is not actually a proper characterization related electrical or thermal properties. These properties do not depend on the individual atoms but rather these physical properties are only manifested in bulk materials and depend on temperature, composition, crystal or amorphous structure, etc. Some materials, for instance, will change from insulating to conducting under pressure.
