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TRANSITION ELEMENTS HAVE d-ORBITAL IN THEIR SHELL WHICH HAS LOW SHIELDING EFFECT. DUE TO WHICH THEY HAVE HIGH EFFECTIVE NUCLEAR CHARGE. SO, HIGH POLARIZING POWER.
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What elements are rare have high densities an used in industrial purposes?
Transition metals
What does the term polarising power of a cation mean?
Polarizing power: Polarising power is the ability of an atom or group of atoms to attract the shared pair of electrons toward itself. For example: If you have aluminium chloride.... the aluminium ion has a 3+ charge and is relatively small. The chlorine ion has a 1- charge and is larger than the aluminium ion. As a result...the aluminium ion has a higher charge density (i.e. a stronger attraction) and so attracts the shared pair of electrons (between the chlorine and aluminium) towards itself. we say aluminium has high polarising power because of its ability to do this. And the chlorine is easily polarised because the electrons get taken away from it.
Why transitional elements have high enthalpy of atomisation?
Transition metals possess a high melting points and boiling points.These properties are due to mettalic bonding by delocalized electrons,leading to cohesion which increases with the number of shared elements.
What is true about transition metals?
Transition metals are elements that also have the properties of metals. All of them have high heat conductivity, low ionization energies and high melting points. Examples of transition metals are vanadium, nickel, and zinc.
What of the following is a Characteristic of the transition metals?
They are malleable.
Why xenon has high polarising power?
Because it is a large atom.
What elements are rare have high densities an used in industrial purposes?
Transition metals
How would you describe the elements in groups 3-12?
Transition Metals; The general properties of the transition elements areThey are usually high melting point metals.They have several oxidation states.They usually form colored compounds.They are often paramagnetic.
What does the term polarising power of a cation mean?
Polarizing power: Polarising power is the ability of an atom or group of atoms to attract the shared pair of electrons toward itself. For example: If you have aluminium chloride.... the aluminium ion has a 3+ charge and is relatively small. The chlorine ion has a 1- charge and is larger than the aluminium ion. As a result...the aluminium ion has a higher charge density (i.e. a stronger attraction) and so attracts the shared pair of electrons (between the chlorine and aluminium) towards itself. we say aluminium has high polarising power because of its ability to do this. And the chlorine is easily polarised because the electrons get taken away from it.
Why transitional elements have high enthalpy of atomisation?
Transition metals possess a high melting points and boiling points.These properties are due to mettalic bonding by delocalized electrons,leading to cohesion which increases with the number of shared elements.
What is true about transition metals?
Transition metals are elements that also have the properties of metals. All of them have high heat conductivity, low ionization energies and high melting points. Examples of transition metals are vanadium, nickel, and zinc.
Properties of transition metals?
They often form colored compounds.They can have a variety of different oxidation states.At least one of their compounds has an incomplete d-electron subshell.They are often good catalysts.They are silvery-blue at room temperature (except copper and gold).They are solids at room temperature (except mercury).They form complex ions (aqua ions included).They are often paramagnetic.
What of the following is a Characteristic of the transition metals?
They are malleable.
Which transistor is used for high speed power application?
In transistor the heat is created during transition stage means from cutoff to saturation and reverse, so if transistor used for high frequency application power loss can be minimized. The heat produced during switching is actually power loss.
Which are the characteristics of transition metals?
High density, High melting point, Nonreactive
Countries in the first stage of demographic transition have?
a high death rate and a high birthrate.
Why can transition metals be used to make electrical wires?
Their high conductivity is why transition metals are used to make electrical wires.
