This blog covers a lot information about the chemistry subject in specific to help and guide students in their studies.
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Chemist World offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle chemistry subject in specific.
Photoelectric effect: Photon: in 1905 Einstein suggest that light(electromagnetic radiations) is made up of tiny particles known as photon . photons are the packets of energy . Einstein suggested that energy is not emitted continuously but is emitted as individual amount of energy known as Quantum energy. Energy of Photon: The energy of photon is given by Einstein E=hv where, E= energy of photon h=plank's constant v=frequency Properties of Photon: Photon have no mass. Photon posses no charge and are not deflected by electric or magnetic field. The values of all quantum number...
Definition of d-block elements The elements of periodic table belonging to group 3 to 12 are known as d-Block elements . because in these elements last electron enters in d sub shell or d orbital The d -block elements lies in between s- and p-block elements in the long form of periodic table. Electronic Configuration • Across the 1 st row of the d block (Sc to Zn) each element – has 1 more electron and 1 more proton – Each “additional” electron enters the 3d sub-shell – The core configuration for all the period 4 transition elements is that of Ar • 1s 2 2s 2 2p 6 3s 2 3p 6 Energy level of Argon Energy level of Transition metals Chromium and Copper • ...
Physical properties of d-block elements Key points: The properties of the d metals are largely derived from their electronic structure, with the strength of metallic bonding peaking at Group 6; the lanthanide contraction is responsible for some of the anomalous behaviour of the metals in the 5d series. The d block of the periodic table contains the metals most important to modern society. It contains the immensely strong and light titanium, the major components of most steels ( Fe, Cr, Mn, Mo ), the highly electrically conducting copper, the malleable gold and platinum , and the very dense osmium and iridium . To a large extent these properties derive from the nature of the metallic bonding that binds the atoms together. Generally speaking, the same band structure is present for all the d-block metals and arises from the overlap of the (n 1)s orbitals to give an s band and of the nd orbitals to give a d band. The principal differences between the metals is...
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