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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.
Wiki User
∙ 12y ago
Wiki User
∙ 10y agoTransition metal has high heat of
atomisation due to presence of strong
metallic bond which arises due to
presence of unpaired electron in the
(n - 1) d subshell.
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Do transitional metals have high density?
Yes, transitional metals do have high density.(This is due to the tightly packed crystal lattice of the metallic structure.)
Suggest a reason why magnesium oxide is used to line the inside of furnaces?
Because it has a very high lattice enthalpy as a result of it's relatively high charge density, therefore it is very thermally stable i.e. it has a very high melting point.
How do you draw enthalpy level diagrams?
its difficult to illustrate on this but basically the x axis is the progress of the reaction going from reactants to products the Y axis is the enthalpy, depending on whether it is an endothermic or expthermic reaction the chemicla reactants start at either high (for exothermic) or low (for endothermic). exothermic start high as you might say the reactants hold alot of energy hence why when the reaction takes place they release the energy. The fact that they release the energy means that when the reaction is finished the products will have lower enthalpy in an exothermic reaction as some energy is lost as heat along the waythe graph physically looks like this:http://www.avogadro.co.uk/h_and_s/bondenthalpy/hdiagrams.gif but you need an understanding of it to draw your own
Why do transition elements have high polarising power?
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.
Why do elements for bonds?
Elements for bonds because they have a high tendency to be stable, this means that they have high tendency to attain the octet or doublet rule (only in the case of hydrogen).
How can you tell what kind of bonds an elements atoms have?
atoms having low Ionisation enthalpy and ones having high electronegativity form ionic bond
What elements on the table are most reactive why?
Sodium, Potassium, and other alkali metals are very reactive due to the low ionization enthalpy. Flourine, Chlorine and other halogens are very reactive due to the high negative electron gain enthalpy.
Why does oxygen gas not have an enthalpy of formation but ozone does?
Ozone gas has enthalpy of formation. It is due to the high altitude.
Does chemical adsorption have a high adsorption enthalpy?
no
What is a good sentence using the word enthalpy?
The first is the comparatively very high lattice enthalpy of the solid fluoride.
Do transitional metals have high density?
Yes, transitional metals do have high density.(This is due to the tightly packed crystal lattice of the metallic structure.)
Why HF has high neutralization enthalpy?
Because of high value of hydration energy.
What has the author H Groenig written?
H. Groenig has written: 'High enthalpy testing in hypersonic shock tunnels' -- subject(s): Hypersonic shock tubes, High enthalpy testing
Why is the standard enthalpy change of neutralization between hydrofluoric acid and sodium hydroxide more negative than usual?
Because of high of heat of Hydration of HF ( Fluoride ion is extensively hydrated because of it's small size )
The cooling effect of perspiration as it evaporates from the skin is the result of high of water?
Enthalpy of vaporization
Which has highest electron gain enthalpy between chlorine and fluorine and why?
Even though Fluorine has the highest electronegativity among all the elements and it should have the highest electron gain enthalpy among all the halogens but this is an exception and chlorine has higher electron gain enthalpy than Fluorine. The reason for this is that the size of Fluorine atom is very small and hence there is very high inter-electronic repulsion among the electrons of fluorine. This makes incoming of another electron not very favourable. Even though fluorine has large negative electron gain enthalpy but for chlorine its even more negative.
What is the significance of high hydration enthalpy?
Enthalpy of hydration is the energy change for converting 1 mol of an anhydrous substance to 1 mol of the hydrated substance. More the hydration enthalpy more will be the energy released on getting hydrated. The stability of any species is inversely proportional to the energy content and any chemical species tends to becoming more and more stable. Thus having high hydration enthalpy means it will become more stable on hydration and thus it will tend to forming its hydrate.
