EASY
Earn 100

An α - particle is identical with

50% studentsanswered this correctly

Important Questions on Structure of Atom

EASY
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
An element with mass number 181 contains 32% more neutrons as compared to protons. What is the symbol of that element?
MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The ratio of the highest to the lowest wavelength of Lyman series is
EASY
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The number of protons, neutrons and electrons in 71175Lu, respectively, are
MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The number of protons, neutrons and electrons in C613 respectively are
MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The correct increasing order of the electronegativity is
HARD
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
Consider a hypothetical case in which the charge of a proton is twice as that of an electron. Using this hypothetical case, how many protons P, neutrons N and electrons E would a neutral Na23 atom contain?
EASY
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
Hydrogen has three isotopes A, B and C. If the number of neutron(s) in A, B and C respectively, are x, y and z, the sum of x, y and z is
MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The radius R of a nucleus of mass number A can be estimated by the formula R=1.3×10-15A1/3m. It follows that the mass density of a nucleus is of the order of: Mprot≅Mneut ≃1.67×10-27 kg
MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The sum of the total number of neutrons present in protium, deuterium and tritium is
MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

Match the following :
List -I :
(a) Frequency of distribution of the emitted radiation from a black body
(b) Spin quantum numbers(ms)
(c) Angular Momentum
(d) All orbital have equal energy

List - II :
(i) degeneracy
(ii) temperature dependent
(iii) vector quantity
(iv) mass times velocity times radius 

Codes:

MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The masses of an electron, a proton and a neutron respectively will be in the ratio
MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:
MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The introduction of a neutron into the nucleus of an atom would lead to a change in
EASY
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
Isotopes are
EASY
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The nitride ion in lithium nitride is composed of
EASY
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

Select the correct statements from the following :

A. Atoms of all elements are composed of two fundamental particles.
B. The mass of the electron is 9.10939 × 10-31 kg.
C. All the isotopes of a given element show same chemical properties.
D. Protons and electrons are collectively known as nucleons.
E. Dalton's atomic theory, regarded the atom as an ultimate particle of matter.

Choose the correct answer from the options given below:

EASY
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
Which of the following is the correct unit of angular momentum of an electron in an orbital of an atom ?
MEDIUM
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
The relation between the stopping potential V0 and frequency v is correctly represented in [ϕ= Work function]
EASY
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
Which of the following conclusions could not be derived from Rutherford's α-particle scattering experiment:
EASY
Chemistry>Physical Chemistry>Structure of Atom>Atomic Models
Rutherford's α - particle dispersion experiment concludes