The electronic transitions from n = 2 to n= 1 will produce shortest wavelength in (where n = principal quantum state)
Li2+
He+
H
H+
In the following electron-dot structure, calculate the formal charge from left to right nitrogen atom;
-1, -1, +1
-1, +1, -1
+1, -1, -1
+1, -1, +1
A radioactive atom M emits two a particles and one B particle successively. The number of neutrons in the nucleus of the product will be
X - 4 - Y
X - Y - 5
X - Y - 3
X - Y - 6
B.
X - Y - 5
An α-emission reduces the atomic mass by 4 and atomic number by 2, whereas a β-emission increases the atomic number by 1 with no change in atomic mass.
Number of neutrons = mass number - atomic number
= X - 8 - Y + 3
= X - Y - 5
For a particular value of azimuthal quantum number, the total number of magnetic quantum number values are given by
l =
l =
l =
m =
What is the wavelength of an α-particle having mass 6.6 × 10-27 kg moving with a speed of 105 cms-1? ( h = 6.6 × 10-34 kgm2 - s)?
2 × 10-12 m
3 × 10-10 m
1 × 10-10 m
2 × 10-10 m
With what velocity should an -particle travel towards the nucleus of a copper atom to arrive at a distance of 10-13m from the nucleus of the copper atom?(K = 9x 109 Nm2/C2 (Mass of -particle = 6.64 x 10-27kg).
634 x 106 ms-1
634 x105 ms-1
5.34 x 106 ms-1
534 x 105 ms-1
What is the ratio of the velocities of CH4 and O2 molecules so that they are associated with de-Broglie waves of equal wavelengths?
1:2
2: 1
3: 2
1: 2
The ratio of slopes of Kmax vs V and V0 vs v curves in the photoelectric effects gives (v = frequency, Kmax = maximum kinetic energy, v0 = stopping potential)
the ratio of Planck's constant of electronic charge
work function
Planck's constant
charge of electron