The NCERT Solutions ncetr Class 11 Chemistry provided on this page for Chapter 2 provide detailed explanations with the steps to be followed, while solving the numerical value questions that are frequently asked in examinations.
The subtopics covered under the chapter are listed. Will the answer change if the temperature and pressure are changed? Number of neutrons in 7 mg 0. These values remain constant regardless of any change in temperature and pressure since these factors do not affect the number of protons in the atom and the mass of each proton. Write the complete symbol for the atom with the 10th ncert 6.6 include atomic number Z and atomic mass A.
Calculate the wavelength, ncerf and wavenumber of a light wave whose period is 2. What is the number of photons of light with a wavelength of pm that provides 1J of energy? Hence, the number of photons with a wavelength incluve pm and energy of 1 J are 2. Therefore, the velocity of the ejected photoelectron is 5.
Electromagnetic radiation of wavelength nm is just sufficient to ionise the sodium atom. Calculate the ionisation energy of sodium in kJ mol �1. A 10th ncert 6.6 include bulb emits monochromatic yellow light of the wavelength of 0. Calculate the rate of emission of quanta per second. The energy involved in this transition can 10th ncert 6.6 include calculated using the following expression:. Hence, a lower amount of energy is required in order to ionize electrons ijclude the 5th orbital of a hydrogen atom when compared to do that in the 10th Ncert 6.6 Year Old ground state of the atom.
Total no. What is the energy associated with the fifth orbit? Calculate 10thh wavenumber for the longest wavelength transition in the Balmer series of atomic hydrogen.
What is the energy in joules, required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state?
The ground state 10th ncert 6.6 include energy is �2. The ground-state electron energy is �2. Energy E associated with the n th Bohr orbit of an atom is:. What is the longest wavelength of light in cm that can be used to cause this 10th ncert 6.6 include Calculate the wavelength of an electron moving with a velocity of 2.
Therefore, the wavelength associated with the electron which is moving with a velocity of 2. The mass of an electron is 9. If its K. Given, K. Since K. II What are the atomic numbers of elements whose outermost electrons are represented by.
The ncrt configuration of the Hydrogen 10th ncert 6.6 include in its ground 10h 1s 1. The single negative charge on this atom 110th that it has gained an electron. The species has 10tu one electron accounted for by the -1 charge. Complete electronic configuration: 1s 2 2s 2 2p 6 3s 1. Complete electronic configuration: 1s 2 2s 2 2p 3. Complete electronic configuration: 1s 2 2s 2 2p 6 3s 2 3p 5. Complete electronic configuration: 1s 2 2s 2 2p ibclude 3s 2 3p 3.
The element is phosphorus P. Complete electronic configuration: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 1. The element is scandium Sc. An electron is in one of the 3d orbitals. Give the possible values of n, l and m l for 10th ncert 6.6 include electron. An atom of an element contains 29 electrons and 35 neutrons. Deduce i the number of protons and ii the electronic configuration of the element. In a neutral atom, no.
The electronic configuration of this element atomic number 29 is 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 3d The element is copper 6. Ans: No. What are the possible values of l and m l? II List the quantum numbers m l and l of electrons influde 3d orbital.
Its values range from 100th to l. Using s, p and d notations, describe the orbital with the following quantum numbers. Explain, giving reasons, which of the following sets of quantum numbers are not possible. Electron configuration for an atom with 32 electrons: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple includee the de Broglie wavelength associated 10th ncert 6.6 include the electron revolving around the orbit.
Hydrogen atoms have only one electron. The ionization energy for the H atom in the ground state is ncsrt. If the diameter of a carbon atom is 0. Space occupied by one carbon atom 0. Calculate the radius of carbon atom if the length of this arrangement is 2. The diameter of the zinc atom 6.6 2. Calculate a radius of zinc atom in pm and b number of atoms present in a length of 1. A certain particle carries 2.
Calculate the number of electrons present in it. Therefore, No. If the thin foil of light atoms like Aluminium. The results obtained when a foil of heavy atoms will be different from the results obtained when relatively light atoms are used in the foil.
The lighter the atom, incude lower the magnitude of positive charge in its nucleus. Answer briefly. An element with mass number 81 contains Assign the atomic symbol. An ion with mass number 37 possesses one unit of negative charge. If the ion contains An ion with mass number 56 contains 3 units of positive charge and Assign the symbol to this ion. Let the total no. Now, total no.
Arrange the following type of radiations in increasing 10thh of frequency: a radiation from microwave oven b amber light from traffic signal c radiation from FM radio d cosmic rays from outer space and e Influde. Nitrogen laser produces radiation at a wavelength of If the number of photons emitted is 5. Hence, the power of the laser is 3.
Neon gas is generally used in the signboards. If it emits strongly at incude, calculate a the frequency of emission. Therefore, In cnert observations, signals observed from the distant stars are generally weak.
If the photon detector receives a total of 3. Lifetimes of the molecules in the excited states are often measured by using pulsed radiation source of duration inclure in the nanosecond range. If the radiation source has the duration of includs ns and the number 10th ncert 6.6 include photons emitted during 10th ncert 6.6 include pulse source 10th ncert 6.6 include 2.
Hence, the energy of the source E is 8. The work function for the caesium atom is 1. Calculate a the threshold wavelength and b the threshold 10th ncert 6.6 include of the radiation. If 10tn caesium element is irradiated with a wavelength of nm, calculate the kinetic energy and the velocity of the ejected photoelectron.
Following results are observed when sodium metal is irradiated with different wavelengths. The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying the voltage of 0.
Calculate the work function for silver metal. As per the law of conservation of energy, the energy associated with an incident photon E must be equal to the sum of its kinetic energy and the work function W 0 of the 10th ncert 6.6 include. The potential that is applied to the silver is transformed into the kinetic energy K.
E of the photoelectron.
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