Orbitals

Q.

What is the maximum capacity of a shell of quantum number n?

1. n/2

2. n³

3. 4n

4. 2n²

Q. 103. Positronium consists of an electron and a positron(a particle which has the same mass as anelectron, but opposite charge) orbiting around theircommon centre of mass. Calculate the value ofRydbergs constant for this system (RH is Rydbergconstant for Hydrogen) (1) RH/ 2 (3) 2 R (2) RH /4(4) RH

Q. the wave no. of spectral line corresponding to n1=3 n2=5 for h atom is R=109677

Q.

As atomic orbitals are filled according to the Aufbau principle, the 6s orbitals are filled immediately after which of the following orbitals?

1. 5d

2. 7s

3. 4f

4. 5p

Q. Why does the wave function become negative in case of 2s orbital?

Q. Match the following :

$\left(1\right)$	Dumbbell shape	$\left(p\right)$	s-orbital
$\left(2\right)$	Double dumbbell shape	$\left(q\right)$	p-orbital
$\left(3\right)$	Complex shape	$\left(r\right)$	d-orbital
$\left(4\right)$	Sherical	$\left(s\right)$	f-orbital

1. 1-q, 2-r, 3-s, 4-p
2. 1-r, 2-q, 3-s, 4-p
3. 1-q, 2-r, 3-p, 4-s
4. 1-q, 2-s, 3-r, 4-p

Q. 26.Show that the circumfernce of the bhor orbit for the hydrogen atom is an intregral multiple of the de brogli wavelength associsted with electron revolving around the orbit.

Q. 6.What is atomic stability?

Q.

According to Bohrs theory, the angular momentum of an electron in 5th orbit is:

1. 

2. 5h

3. 

4. Both (B) & (C)

Q. if each orbital can hold a maximum of 3 electrons. The number of elements in 2nd period of periodic table will b

Q. Maximum number of orbitals present in fourth shell is

Q. Why does the wave function become negative in case of 2s orbital?

Q. Which of the following has highest electron gain enthalpy?
(A) $\left[Ne\right]3s^{2}3p^3$
(B) $\left[Ne\right]3s^{2}3p^4$
(C) $\left[Ne\right]3s^{2}3p^5$
(D) $\left[Ne\right]3s^{2}3p^2$

1. (A)
2. (B)
3. (C)
4. (D)

Q. The impossible overlap among the following is:

1. 
2. 
3. 
4. 

Q. what is wave function/atomic orbital?

Q. Statement I: The $5^{th}$ period of the periodic table contains 18 elements and not 32.
Statement II: $n=5,l=0,1,2and3$. The order in which the energy of the orbitals 4d, 5s and 5p increases is $5s<4d<5p$. The total number of orbitals available are 9 and thus, 18 electrons can be accomodated.

1. Both the statements are true and Statement II is a correct explanation of Statement I
2. Both the statements are true and Statement II is not a correct explanation of Statement I
3. Statement (I) is true and Statement (II) is false
4. Statement (I) is false and Statement (II) is true

Q. Which of the following molecules has the largest extent of back bonding?

1. $B{F}_3$
2. $BC{l}_3$
3. $B{I}_3$
4. $BB{r}_3$