Call me

Have a Query? We will call you right away.

+91

E.g: 9876543210, 01112345678

We will give you a call shortly, Thank You

Office hours: 9:00 am to 9:00 pm IST (7 days a week)

What are you looking for?

Syllabus

what are

ISOELECTRONIC SPECIESand give examples.Why is Fe

^{3+ }ion more stable than Fe^{2+}ion?drawbacks of j j thomson atomic models

a block of mass 'm' is placed on a smooth wedge of inclination of theta.the whole system is accelerated horizontally so that the block does not slip on the wedge.The force exerted by the wedge on block has a magnitude.

(1) 52.2 kcal/mol (2) 93.4 kcal/mol

(3) 63.4 kcal/mol (4) 100 kcal/mol

explain pauli's exclusion principle

_{e}=9.11x10^{-31}KgLead is not known to form an iodide. PbI

_{4}. Give reasonWhat's is hunds rule of maximum multiplicity Explain with many example and how is it different from the other

How many electrons in sulphur ( Z = 16 ) can have n + l = 3 ?

Calculate the energy associated with the 1st orbit of He+. What is the radius of the orbit?

Pls give the answer in steps..!

Why is electron gain enthalpy of chlorine is more than fluorine?

calculate de broglie wavelength of an electron and a proton having same kinetic energy of 100 eV

calculate mass of photon with wavelength 3.6 A

^{.}?why are bohr's orbits called stationary states?

why electon cannot exist in the nucleus?

what is the limitations of de broglie's equation?

ratio of e/m of electron and alpha particle is

Q.) Which transition of Li

^{2+ }is associated with same energy change as n=6 to n=4 transition in He^{+}.(I) n=3 to n=1 (II) n=8 to n=6 ( III) n=9 to n=6 (IV) n=2 to n=1

URGENT:An electron has a velocity of 300 m s

^{-1}that is accurate to 0.01%. With what accuracy can one locate the position of this electron ( mass of electron = 9.1 * 10^{-31}kg )?Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen.

Write the electronic configuration of (i) Mn4+, (ii) Fe3+ (iii) Cr2+ and Zn2+ Mention the number of

unpaired electrons in each case.

What is the derivation of the radius of the n

^{th}orbit in bohr's model?the formula is R

_{n}= (4Ï€Îµ_{0})n^{2}h^{2 }/ 4Ï€^{2}me^{2}In an atom two electrons move around the nucleus in circular orbit of radii R and 4R. The ratio of time taken by them to complete one revolution is

(a)1:8 (b)4:1 (c)1:4 (d)8:7

Calculate the wavelength of first and last line in the Balmer series of Hydrogen spectrum.

Why do half filled and completely filled orbitals have extra stability?

How do dx2-dy2 and dxy orbitals differ in their orientation in space?

state Heisenberg's Uncertainty principle?

^{+ }is -871.6 x 10^{-20 }J.the energy of the electron in the first orbit of hydrogen would be ?Light of wavelength 5000 A falls o n a metal surface of work function 1.9 eV . Find (a ) the energy of photons (b) kinetic energy of photoelectrons . [1eV = 1.6 * 10 (-19) J ] please answer fast

Give any 5 differences between ORBIT ORBITALS

The mass of an electron is 9.1x10

^{-31}kg.If its kinetic energy is 3.0x10^{-25}J.CALCULATE ITS WAVELENGTH........What is the lowest value of 'n' that allows 'f' orbitals to exist?

a) 2pi x

b) 6pi x

c)9x

d)x/3

difference between notation of 'l' and 'L'.

calculate the mass and charge of one mole of electron?

^{16}Hz, emits photoelectrons with twice kinetic energy as did photo electrons when the same metal is irradiated by light of frequency 2*10^{16}Hz. Find the threshold frequency of the meatl?how many nodes are present in 4 d orbital

Find (a) the total number and (b) the total mass of neutrons in 7 mg of

^{14}C.(Assume that mass of a neutron = 1.675 × 10

^{–27}kg).With what velocity should an alpha particle travel towards the nucleus of a copper atom so as to arrive at a distance 10

^{-13}m from the nucleus of a copper atom?calculate the energy and frequency of light required to excite an electron in hydrogen atom from first energy level to fourth energy level

Explain and derive schrodinger wave equation for hydrogen and hydrogen like species.

Calculate the mass of a photon of sodium light having wavelength 5894 A

^{0}& velocity as 310^{8 }ms^{- 1}Calculate energy of one mole of photons

how many nodal planes are there in dz

^{2 }orbital ??? ( most of the authors wrote 2 , bt sme renowned experts wrote ZERO ) so m confused between zero n two ???The kinetic energy of an electron has been found to be 5.76*10^-15J.Calculate the wavelength

^{th}orbit, the minimum and maximum number of spectral lines should respectively be(A) 1. 4 (B) 4. 1 (C) 3. 4 (D) 1. 6

what are the frequency and wavelenght of a photon emitted during a transition from n=5 state to n=2 state in the hydrogen atom

How do d

^{x2 }-^{y2}and d xy orbital's differ in their orientation in space?what is the difference between 2O and O

_{2}DIFFERENCE BETWEEN WAVE AND PARTICLE NATURE? IN BRIEF

What is photoelectric effect?

a) 20 x 10

^{14}Hzb) 10 x 10

^{14}Hzc) 5 x 10

^{14 }Hzd) 1 x 10

^{14}HzHow many photons of light having a wavelength 400 nano meter are necessary to provide 1 joule of energy?

calculate the no. of protons in 10g of CaCO

_{3}. N_{A}=6.02* 10^{23.}correct set of quantum number for unpaire electron in chlorine

Two particles A and B are in motion. If the wavelength associated with particle A is 5x10^-8m, calculate wavelength associated with B if its momentum is half of A

Calculate the minimum amount of energy that the photon must carry in order to eject an electron from caesium metal. The threshold frequency of caesium is 4.6X10 raised to power 14 Hz.

The kinetic energy of a subatomic particle is 5.85x10^-25 J. Calculate the frequency of the particular wave.

What is black body radiation?A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate

the number of photons emitted per second by the bulb.Why Pauli exclusion principle is called exclusion principle ??no links plz..What are planck's postulates..??

9. The electron gain enthalpy of chlorine is -349 kJ mol

^{-1}. How much energy in kJ is released when 3.55g of chlorine is converted completely into Cl^{-}ion in the gaseous state?Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. Calculate the ionisation energy of sodium in kJ mol

^{–1}.the first emission line in the atomic spectrum of hydrogen in the balmer series appears at-

1. 5R/36 /cm 2.3R/4/cm 3.7R/144/cm 4.9R/400/cm

_{x2}_{- y2}_{z2}_{xy}_{}2p_{z}what is the difference between absorption and emission spectrum

calculate the wavelength , frequency nd wavenumber of a light wave whose period is 2.0 x 10

^{-10}why is hunds rule called the rule of maximum multiplicity????