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
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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...
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 ...
Why do elements form compounds? Explain why magnesium metal is more reactive than aluminum metal even though they are in the same period of the periodic table. Explain the way in which atoms are held together in a chemical compound.
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...
However, the children's constructions showed a contingency between the order of the elements and the children's choice of morpheme, suggesting that they were often aiming for the target form. These results suggest that children do not misorder nouns and verbs in NV-er compounds because of ...
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(or 2, for the alkaline earths) to form cations. The halogens, on the other hand, readily accept the electrons to form anions. While the anions are more stable than the atoms, it's even better if the two types of elements can get together to solve their energy problem. This is ...
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 ...