An orbital in which n = 4 and l = 2 is expressed by
An orbital in which n = 4 and l = 2 is expressed by
Options
(a) 4s (b) 4p (c) 4d (d) 5p
Correct Answer:
4d
Explanation:
No explanation available. Be the first […]
Structure of Atom
The isotopes of elements were discovered by
The isotopes of elements were discovered by
Options
(a) Thomson (b) Soddy (c) Chadwick (d) Curie
Correct Answer:
Soddy
Explanation:
No explanation available. Be the first to write the explanation for this question […]
Which of the following sets of quantum numbers violates the rules of quantum mechanics
Which of the following sets of quantum numbers violates the rules of quantum mechanics
Options
(a) n=3, l=2, ml=-3, ms=+1/2 (b) n=3, l=1, ml=-1, ms=-1/2 (c) n=4, l=0, ml=0, ms=+1/2 (d) n=3, l=2, […]
The wavelength of the radiation emitted when an electron drops from 3rd orbit
The wavelength of the radiation emitted when an electron drops from 3rd orbit to 2nd orbit in H – atom will be nearly
Options
(a) 3300 A⁰ (b) 6600 A⁰ (c) 9900 A⁰ […]
How many unpaired electrons are present in ground state for Fe²⁺(Z=26)
How many unpaired electrons are present in ground state for Fe²⁺(Z=26)
Options
(a) 6 (b) 2 (c) 8 (d) 4
Correct Answer:
4
Explanation:
No explanation available. Be the first to write the […]
How many electrons in an atom with atomic number 105 can have (n + l) = 8
How many electrons in an atom with atomic number 105 can have (n + l) = 8
Options
(a) 30 (b) 17 (c) 15 (d) unpredictable
Correct Answer:
17
Explanation:
No explanation available. […]
Bohr’s theory was modified to give the concept of elliptical orbits by
Bohr’s theory was modified to give the concept of elliptical orbits by
Options
(a) Davison (b) Rutherford (c) Hund (d) Sommerfeld
Correct Answer:
Sommerfeld
Explanation:
No explanation available. Be the first to write […]
The energy of an electron in the 3rd orbit of hydrogen atom is -E
The energy of an electron in the 3rd orbit of hydrogen atom is -E. The energy of an electron in the Ist orbit is
Options
(a) -3E (b) -E/3 (c) -E/9 (d) -9E
Number of orbitals present in 3rd shell is
Number of orbitals present in 3rd shell is
Options
(a) 1 (b) 3 (c) 9 (d) 18
Correct Answer:
9
Explanation:
No explanation available. Be the first to write the explanation for this […]
The ionisation potential for hydrogen atom is 13.6eV, the ionization potential for He⁺
The ionisation potential for hydrogen atom is 13.6eV, the ionization potential for He⁺ is
Options
(a) 54.4 eV (b) 6.8 eV (c) 13.6 eV (d) 24.5 eV
Correct Answer:
54.4 eV
Explanation:
No […]