Which is the correct order of increasing energy of the listed orbitals in the atom of titanium.(At.no.Z=22)
Options
(a) 4s 3s 3p 3d (b) 3s 3p 3d 4s (c) 3s 3p 4s 3d […]
Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium
Options
(a) [Xe] 4f⁹5s¹ (b) [Xe]4f⁷5d¹6s² (c) [Xe]4f⁶5d²6s² (d) [Xe]4f⁸6d²
Correct Answer: […]
What is the maximum number of orbitals that can be identified with the following quantum numbers ? n =3,l =1,ml =0
Options
(a) 1 (b) 2 (c) 3 (d) 4
Correct Answer:
1
Explanation: […]
Calculate the energy in joule corresponding to light of wavelength 45nm.(Plank’s constant , h=6.63 ˣ 10⁻³⁴ Js, speed of light , c = 3 ˣ 10⁸ ms⁻¹)
Options
(a) 6.67 ˣ 10¹⁵ (b) […]
Be²⁺ is isoelectronic with which of the following ions?
Options
(a) H⁺ (b) Li⁺ (c) Na⁺ (d) Mg²⁺
Correct Answer:
Li⁺
Explanation:
Be²⁺= (4-2) = 2 is isoelectronic with Li⁺ (3-1 =2) Since both […]
According to Dalton’s atomic theory the smallest partical of the matter is called
Options
(a) an ion (b) an atom (c) an electron (d) a molecule
Correct Answer:
an atom
Explanation:
One of […]
The number of unpaired electrons in 1s² 2s² 2p³ is
Options
(a) 3 (b) 1 (c) 5 (d) 2
Correct Answer:
3
Explanation:
1s² 2s² 2p³ ⇒ [1s² 2s² 2p¹(x) 2p¹(y) 2p¹(z)] / unpaired […]
Who modified Bohr’s theory by introducing elliptical orbits for electron path
Options
(a) Rutherford (b) Thomson (c) Hund (d) Sommerfeld
Correct Answer:
Sommerfeld
Explanation:
Sommerfeld modified Bohr’s theory considering that in addition to […]
Chloride ion and potassium ion are isoelectronic. Then
Options
(a) potassium ion is relatively bigger (b) depends on the other cation and anion (c) their sizes are same (d) chlorine ion is bigger […]
Smallest wavelength occurs for
Options
(a) Lyman series (b) Balmer series (c) Paschen series (d) Brackett series
Correct Answer:
Lyman series
Explanation:
No explanation available. Be the first to write the explanation for […]
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