Sulfur, selenium and tellurium, Chemistry

Assignment Help:

SULFUR, SELENIUM AND TELLURIUM

The elements known commonly as the chalcogens are in the same group (16) as oxygen. They form some compounds same to those of oxygen, but show many differences characteristic of other nonmetal groups. Sulfur is widespread in the Earth's crust, finding as metal sulfides, sulfates, and native or elemental sulfur build by bacterial oxidation of sulfides. Many less electropositive metals known as chalcophiles are collect commonly as sulfide minerals, some important examples are sphalerite (zinc blende, ZnS), pyrites (FeS2), molybdenite (MoS2), galena (PbS) and cinnabar (HgS). Volatile sulfur compounds such as organic compounds and H2S are also collect in petroleum and natural gas. The element is used in bigger amounts for the manufacture of sulfuric acid (see below).

Tellurium and selenium are much rarer, found as minor components of sulfide minerals.

Sulfur has various allotropic forms, the most stable of which are molecular solids containing S8 rings. The elemental forms of Te and Se have spiral chains and are semiconductors. In all of those solids each atom forms two single bonds to neighbors. Sulfur collides directly with halogens (except I) and oxygen, and with many less electronegative elements to form sulfides. The other elements show same properties although reactivity declines down the group.

 


Related Discussions:- Sulfur, selenium and tellurium

According to heisenberg uncertainty principle, According to heisenberg unce...

According to heisenberg uncertainty principle: (1) E=mc 2                             (2) Δ x ×  Δp ≥ h/ 4 Π  (3)γ = h/ p     (4)  Δ x ×   Δ = h / 6 Π  Norma

Principal quantum number of an atom represents, Principal quantum number of...

Principal quantum number of an atom represents : (1) Size of the orbital (2) Spin angular momentum (3) Orbital angular momentum (4) Space orientation of the orbital

The maximum probability of finding an electron, The maximum probability of ...

The maximum probability of finding an electron in the d xy   orbital is: (1)  Along the x-axis (2) Along the y-axis (3)  At an angle of 45 0 degree  from the  x  and y

Define degrees of freedom - phase rule and phase diagrams, Define Degrees o...

Define Degrees of freedom - phase rule and phase diagrams? Consider a system in an equilibrium state. In this state, the system has one or more phases; each phase contains one

Ligand field theory, LIGAND FIELD THEORY The five d orbitals with dist...

LIGAND FIELD THEORY The five d orbitals with distinct values of the magnetic quantum number (m) have the similar energy in a free atom or ion. In any compound they interact

What are enzyme cofactors , Some enzymes require other associated molec...

Some enzymes require other associated molecules to work. These molecules are known as enzyme cofactors and they can be, for example, organic ions, like mineral salts, or organic mo

Explain triene-triol isomer, This compound, 1,3,5-cyclohexanetrione, exists...

This compound, 1,3,5-cyclohexanetrione, exists as its "triene-triol" isomer phloroglucinol because the latter is aroma

Organic chemistry, why is soda lime used instead of plain NaOH in preparati...

why is soda lime used instead of plain NaOH in preparation of methane?( for class 10)

Draw a possible configuration of nodes and cells , Consider the 2D shape be...

Consider the 2D shape below. Draw a possible configuration of nodes and cells (at least 15) that could be used to solve for the temperature distribution. Provide equations that wou

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd