Hydrogen is located in the first group of the periodic table and the elements within the same group should have similar properties. Explain in detail. Why do elements from each family have similar properties even though their periodic trends are different? Why is oxygen on the periodic table ...
Give the reasons that makes copper conduct electricity and heat better when compared with wood. Explain. Why do we have free electrons in metal and not in insulators? What makes them be an insulator/semiconductor/metal? Why does polythene charge with rubbing but not copper? What makes copper...
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We began to twig that something similar was going on with the chemical elements more than 150 years ago. Scientists even called it the law of octaves. And it is this repetition in the properties of the elements thatthe periodic tablecaptures so beautifully. Similar elements end up stacke...
aSome people do sth. because 某些人做sth。 因为[translate] asiemensallee siemensallee[translate] aIt is plausible that the utilities of items within a category are correlated because of unobserved variables. To account for this possible correlation within a category, we adopt a nested logit specif...
Wynne doesn't shy away from challenging popular theories about dog behaviour and evolution, from detailing the brutal realities of dogs languishing in shelters across the United States, or from critiquing the ways in which we mythologize dogs and do them a disservice. But the reader comes away...
Periodic Properties: The periodic table categorizes the elements according to their properties and atomic number (number of protons or electrons). Along the period (rows), the atomic number increases. Down the group (columns), chemical properties like atomic radii and ionization energy repeat. ...
(Copper is the most common because it is the most cost effective) The answer is a bit complicated and we site here one of the best answers we have seen for those familiar with the material.. "Silver sits in the middle of the transistion metals approximately 1/2 way between the noble ...
aapplication or computer (machine.config) must have the 正在翻译,请等待...[translate] acd.timesoutlets.com@scoshic.sheinet.com - no such user here. cd.timesoutlets.com @scoshic.sheinet.com -这里没有这样用户。[translate] aI have too many issues to deal with, so seize the moment and not...
Both phosphorous and nitrogen are in group 15 in the periodic table implying they have same number of valence electrons making the lewis structures for bothHX3NOX4HX3NOX4andHX3POX4HX3POX4the same with octet configuration. I do notice compounds exist which do not follow the octet rule (eg:...