Transition elements form complex compounds due to (i) small size of cation. (ii) high nuclear charge of their cation (iii) availability of empty inner d-orbitals (of nearly same energy) for bonding to ligands
4 (a)Explain why compounds of transition elements are usually coloured.[3](b)Coppe is used to make alloys such as brass. The percentage of copper in a sample of brass can be determined by dissolving the sample in concentrated nitric acid and reacting the mixture with potassium iodide. The ...
Describe why most of the compounds formed by transition elements are coloured. Explain the different ways to represent compounds. Why are there so many? Why do transition elements form colored compounds? Give reasons why most of the compounds formed by transition elements are c...
Why do elements form compounds? Why do some metals conduct heat better than others? What causes their difference in heat conductivity? What gives an element its characteristics? Why did Bohr's model not stand up as more experiments were performed...
-Ionic Character: The ionic character of the compounds formed by the first element is usually different from those formed by heavier elements. -Maximum Valency: The maximum valency of the first element can also differ, as seen in the case of beryllium, which can form covalent compounds unlike ...
created out of non organic components, that these non organic parts were present as separate elements on early earth.And later combined in such a way to form organic compounds like amino acids.But there's other evidence that says that points to meteorite as a source of organic compounds, on...
Elements in the same group (column) of the periodic table tend to exhibit similar chemical properties, so silicon, too, can form four covalent bonds, giving it the same potential for diversity as carbon. 如果碳的表现如此之好,那么为硅(在元素周期表中,硅就在碳的下方)就不行呢?元素周期表中同...
bonds they might form with each other. On the far right-hand side of the periodic table is the group of elements called thenoble gases. Atoms of these elements (e.g., helium, krypton, neon) have full outer electron shells. These atoms are stable and very rarely form bonds with other ...
Beacons are pulsating dots that overlay on elements in your application. These beacons have messages that appear when a user hovers over them and can be attached to additional walkthroughs for new features or process changes. Pop-ups are traditional modal windows that allow organizations to embed...
One thing about chemicals is that, once they react in certain ways, they form compounds that are nothing like the original elements. For example, if you react carbon, hydrogen and oxygen together one way you get glucose (C6H12O6). If you react them together another way you get vinegar (C2H...