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Q. Study of Elements of group 16?
We shall discuss Group 16 elements, viz., oxygen, sulphur, selenium, tellurium and polonium. These elements are called chalcogens or the ore forming elements. This name was derived from the Greek name for copper, since most of the copper ores contain members of this group. Compared to Groups 14 and 15 elements, the elements of this group are even more non- metallic in their behaviour. These also exhibit a gradual change towards metallic characteristics down the group. Thus polonium, the last member of the group, is almost metallic. We will describe the occurrence and extraction of these elements and also their allotropic modifications. Uses of these elements and some of their compounds will also be described. We shall then go on to discuss the-general behaviour of these elements and their important compounds like hydrides. Halides oxides and oxoacids.
how alkenes oxidise with potassium
Since flourine is very electronegative as a result hydrogen makes a very positive character.as a result the H-bonding is very strong because of large difference in electronegativit
explain how electrophoretic effect affects transport number
Suffix - IUPAC System of Naming Organic Compounds The word root is associated to the suffix that may be primary or secondary or both of them. (a) Primary suffix: A
Be's 4th electron will have four quantum numbers: n l m s (1) 1 0 0 +1/2 (2) 1 1 +1 +1/2
Number of unpaired electrons in inert gas is: (1) Zero (2) 8 (3) 4 (4) 18 Ans: Zero
Biodegradable polymers These are the polymers that are degraded through micro-organisms in an appropriate period so that biodegradable polymers and their degraded products do n
Calculate the amount of heat required to raise the temperature of an 58 sample of water from 34c to 64c. Express your answer using two significant figures
An electron has principal quantum number 3. The number of its (i) sub-shells and (ii) orbitals would be respectively: (1) 3 and 5 (2) 3 and 7 (3) 3 and 9
Q. Describe about Nuclei and Radioactive Decay? Dalton consideration that atoms were unchangeable. But scientists in the late nineteenth century began to notice that some eleme
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