NCERT Exemplar Class 12
A radioactive isotope has a half – life of T years. How long will it take the activity to reduce to
13
Sep
A radioactive isotope has a half – life of T years. How long will it take the activity to reduce to A radioactive isotope has a half - life of T years. How long will it take the activity to reduce to September 13, 2021 Category: Chapter 13 - Nuclei , NCERT Exemplar Class 12 [...]
Obtain the binding energy of the nuclei 56 26 F e and 209 83 B i 2656Fe and 83209Bi in units of MeV from the following data: m ( 56 26 F e ) = 55.934939 u m(2656Fe) = 55.934939 u m ( 209 83 B i ) = 208.980388 u
13
Sep
Obtain the binding energy of the nuclei 56 26 F e and 209 83 B i 2656Fe and 83209Bi in units of MeV from the following data: m ( 56 26 F e ) = 55.934939 u m(2656Fe) = 55.934939 u m ( 209 83 B i ) = 208.980388 u (a) Two stable isotopes [...]
Obtain the binding energy (in MeV) of a nitrogen nucleus ,(147N) given m(147N) =14.00307 u
13
Sep
Obtain the binding energy (in MeV) of a nitrogen nucleus ,(147N) given m(147N) =14.00307 u (147N) given m(147N) =14.00307 u Obtain the binding energy (in MeV) of a nitrogen nucleus September 13, 2021 Category: Chapter 13 - Nuclei , NCERT Exemplar Class 12 , Physics ,
The three stable isotopes of neon: 2010Ne 2110Ne and 2210Ne have respective abundances of 90.51%, 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99 u, 20.99 u and 21.99 u, respectively. Obtain the average atomic mass of neon.
13
Sep
The three stable isotopes of neon: 2010Ne 2110Ne and 2210Ne have respective abundances of 90.51%, 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99 u, 20.99 u and 21.99 u, respectively. Obtain the average atomic mass of neon. 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99 u 20.99 [...]
(a) Two stable isotopes of lithium 63Li and 73Li have respective abundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u, respectively. Find the atomic mass of lithium.
13
Sep
(a) Two stable isotopes of lithium 63Li and 73Li have respective abundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u, respectively. Find the atomic mass of lithium. (a) Two stable isotopes of lithium 63Li and 73Li have respective abundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and [...]
Obtain the first Bohr’s radius and the ground state energy of a muonic hydrogen atom [i.e., an atom in which a negatively charged muon (μ−) of mass about 207 me orbits around a proton]
13
Sep
Obtain the first Bohr’s radius and the ground state energy of a muonic hydrogen atom [i.e., an atom in which a negatively charged muon (μ−) of mass about 207 me orbits around a proton] an atom in which a negatively charged muon (μ−) of mass about 207 me orbits around a proton] Obtain the first [...]
The total energy of an electron in the first excited state of hydrogen is about – 3.4 eV.
13
Sep
The total energy of an electron in the first excited state of hydrogen is about – 3.4 eV. The total energy of an electron in the first excited state of hydrogen is about - 3.4 eV. September 13, 2021 Category: Chapter 12 - Atoms , NCERT Exemplar Class 12 , Physics ,
A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of wavelengths will be emitted?
13
Sep
A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of wavelengths will be emitted? A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of wavelengths will be emitted? September 13, 2021 Category: Chapter 12 - Atoms , NCERT Exemplar Class 12 [...]
In accordance with the Bohr’s model, find the quantum number that characterises the earth’s revolution around the sun in an orbit of radius 1.5 × 10^11 m with orbital speed 3 × 10^4 m/s. (Mass of earth = 6.0 × 10^24 kg.)
13
Sep
In accordance with the Bohr’s model, find the quantum number that characterises the earth’s revolution around the sun in an orbit of radius 1.5 × 10^11 m with orbital speed 3 × 10^4 m/s. (Mass of earth = 6.0 × 10^24 kg.) find the quantum number that characterises the earth’s revolution around the sun in [...]
The radius of the innermost electron orbit of a hydrogen atom is 5.3×10^11 m. What are the radii of the n = 2 and n =3 orbits?
13
Sep
The radius of the innermost electron orbit of a hydrogen atom is 5.3×10^11 m. What are the radii of the n = 2 and n =3 orbits? The radius of the innermost electron orbit of a hydrogen atom is 5.3×10^11 m. What are the radii of the n = 2 and n =3 orbits? September [...]