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 ...
MixtureThe components of a mixture can be separated by physical processes, such as filtration, distillation, crystallisation etc.Properties CompoundThe physical and chemical properties of a compound are different from those of its constituent elements....
The meaning of COMPOUND is something formed by a union of elements or parts; especially : a distinct substance formed by chemical union of two or more ingredients in definite proportion by weight. How to use compound in a sentence.
Answer to: Describe why most of the compounds formed by transition elements are coloured. By signing up, you'll get thousands of step-by-step...
from those of the elements from which it is formed.In a compound, the elements are combined in...proportions.3] 相关知识点: 试题来源: 解析 (a)(i) carrots; potatoes;()(pH)7;(b)(i) Any two from:plants won't grow if (conditions too) acidto raise the pH / to make the soil less...
Some compounds are created to produce new properties. For example iron and aluminum look similar, but when oxygen is added to each element, iron rusts and aluminum does not. Aluminum can corrode from heavy metals, but at a slow pace. By adding these two elements together and creating iron ...
copper sulfate / CusO.1(b)Complete the following sentences about compounds using words from the list below.chemically different fixed mixed physically similar A compound is a substance which consists of two or more different elementschemically.combined together.The properties of a compound are .dif...
Which of the binary compounds formed by the following pairs of elements are considered ionic compounds? a. C and Fe b. Na and Cl c. Al and C d. H and O Ionic Bonds: The formation of ionic bonds only takes place ...
Daltonides are relatively scarce among the intermetallic compounds. Examples are compounds of magnesium with elements of the main subgroup in Groups IV and V of the Mendeleev periodic system. These intermetallic compounds are of the monosilane (H4Si) type (Mg2Si, Mg2Ge, Mg2Sn, and Mg3Pb) and...
Covalent compounds are formed when electrons are shared between the atoms and due to this sharing of electrons, they exhibit unique physical properties as compared to ionic compounds.Answer and Explanation: Some of the main properties of covalent compounds are : 1. Covalent compounds have a very...