Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
q uses of aluminiumaluminium exhibits useful properties of low density high thermal and electrical conductivity and good corrosion resistance with
q why we use boronboron is used to increase the hardness of steels crystalline boron is used in transistors boron is a good neutron absorber and is
q how can we obtain pure aluminapure alumina is obtained from bauxite ore powdered bauxite mineral is heated in a concentrated solution of sodium
q extraction of aluminiumaluminium cannot be extirpated economically from the silicate minerals therefore bauxite is the most important ore for the
q how can we obtain boronboron is- obtained by the red-action of b2o3 with magnesium or sodium b203 is first prepared by strongly katingh3b03 which
q occurrence of group 13 elementboth boron and aluminium have a high affinity for oxygen so neither of them is found native boron occurs principally
elements of group 13 are namely boron aluminium gallium indium and thallium while studying the alkali and alkaline earth metals you have seen that
x grams of calcium carbonate was completely burnt in airthe weight of solid residue formed is 28 gwhat is the vlue of x in
1 the temperature of the warm water bath is recorded too high how will this technique error affect the reported activation energy for the reaction -
describe a method that could be used to separate the components of the following a sand and iron filings b sawdust and lead pellets csalt and glass
1a compound whose empirical formula is ch3 has a molar mass of 30 gmol what is its molecular formula 3 points2find the molecular formula for each of
047 moles of sodium were reacted with 26g of copperii nitrate if the actual yield of copper metal was 143g what is the percentage yield of this
q illustrate modern atomic model of de broglie1 electrons inhabit the space surrounding the nucleus and can exist in several discrete principal
q what are the de broglies wavesbohr anticipated that hydrogens single electron could orbit at only specific distances from the atoms nucleus when
q explain about bohr atomic modelbohr anticipated that hydrogens single electron could orbit at only specific distances from the atoms nucleus when
q explain emanation spectrum of an atomthe emanation spectrum of an atom indicates that the energy it emits is quantized meaning that only certain
q what is atomic emission spectraatomic emission spectra while atoms of an element in the gaseous phase are excited by an input of energy such as
q define the planck constantthe energy of a photon ephoton of a certain frequency violet is able to be calculated by using the following equation in
q show the particle nature of lightparticle nature of light one of the first main clues to the electron structure of atoms was albert einsteins
q how to determine wavelength of electromagnetic wavesthe frequency as well as velocity of a wave determines its wavelength the distance between
q explain about frequency of electromagnetic waveselectromagnetic waves all along with water waves and sound waves exhibit certain common
q what do you mean by electro-magnetic radiationin the untimely twentieth century scientists accepted the idea that an atom consisted of a massive
q what is gamma radiationthe third kind of radiation is gamma radiation g-radiation which is high-energy electromagnetic radiation gamma radiation is
q describe about nuclei and radioactive decaydalton consideration that atoms were unchangeable but scientists in the late nineteenth century began to
q how to calculate atomic mass of an elementcopper survive as a mixture of two isotopes the lighter isotope cu-63 amid 29 protons and 34 neutrons