Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
GROUP 14: TIN AND LEAD
Tin and lead give some resemblance to the lighter elements in group 14, especially Ge. Although they are uniquely more metallic in their physical and chemical characteristics, simple cationic chemistry is the exception rather than the rule. As with group 13, two oxidation states MIV and MII are found, the MII form giving more stable for lead.
Both substances have rather low abundance, but are commoner than other heavy metals. They occur in the minerals galena PbS and cassiterite SnO2. They each have various stable isotopes, Sn more than any other element (10). Some Pb isotopes are discovered from the radioactive decay of uranium and thorium. The isotopic composition of Pb (and thus its atomic mass) differs detectably according to the source, and such variations have been used to estimate the age the Earth of and of rocks.
The elements are readily made by reduction of their ores and are soft, low-melting, somewhat unreactive metals. Tin is required for plating, and both elements in low-melting alloys and as many elements. Applications of lead are declining as its substances are very toxic. A continuing major need is in leadacid batteries, which depend on two reactions involving the PbII, Pb0 and PbIV states:
Occurring at different electrodes, these show a cell potential of 2 V, greater than can be obtained easily from any other pair of electrode reactions in aqueous solution
Why is that Li is the only element in group 1A that reacts with dinitrogen to a nitride
Solid xenon forms crystals with a face centered unit cell that has an edge of 620 pm. 1. calculate the atomic radius of xenon. 2. calculate the packing efficiency if xenon. So
Q. Illustrate the structure of Alkanes? Ans. Alkanes have the general formula C n H 2n+2 . This means that for every n atoms of carbon, there are 2n + 2 atoms of hydrogen.
Which electronic level would allow the hydrogen atom to absorb a photon but not to emit a photon Ans) We know the energy of electron goes on to become more negative as it reache
what is lattice point?
i need help reading this IR chart to figure out what the compound is
Q. What are the primary factors of influence solubility? Ans. Solubility is the extent to which a solute dissolves in a solvent. Solutions that have larger quantities of
why only phosphate is used for intrnal conditioning???
Stability of alkenes - Applications of hyperconjugation Hyperconjugation describes the stability of specific alkenes over other alkenes. Stability of alkenes ∝ Number of alpha
K3[Al(C2O4)3]
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd