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If the ratio of radius of two different nuclei are in the ratio of 2:3, then ratio of their mass numbers will be

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Important Questions on Atomic Structure

EASY
Chemistry>Physical Chemistry>Atomic Structure>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 Ć— 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:

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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
Which of the following is an example of Law of multiple proportion?
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
The statement related to law of definite proportions is
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
The number of protons, neutrons and electrons in 71175Lu, respectively, are
MEDIUM
Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
The correct increasing order of the electronegativity is
EASY
Chemistry>Physical Chemistry>Atomic Structure>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
EASY
Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
Among the following pairs of compounds, the one that does not illustrate the law of multiple proportions, is
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
The masses of an electron, a proton and a neutron respectively will be in the ratio
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
The sum of the total number of neutrons present in protium, deuterium and tritium is
EASY
Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
Which of the following is the correct unit of angular momentum of an electron in an orbital of an atom ?
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
An element with mass number 181 contains 32% more neutrons as compared to protons. What is the symbol of that element?
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
Isotopes are
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
The ratio of the highest to the lowest wavelength of Lyman series is
HARD
Chemistry>Physical Chemistry>Atomic Structure>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?
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
The introduction of a neutron into the nucleus of an atom would lead to a change in
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
The number of protons, neutrons and electrons in C613 respectively are
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
A particular station of All India Radio, New Delhi, broadcasts on a frequency of 1,368 kHz (kilo Hertz). The wavelength of the electromagnetic radiation emitted by the transmitter is [speed of light, c=3.0Ɨ108 ms-1]
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Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
The relation between the stopping potential V0 and frequency v is correctly represented in [Ļ•= Work function]
EASY
Chemistry>Physical Chemistry>Atomic Structure>Atomic Models
Which of the following conclusions could not be derived from Rutherford's Ī±-particle scattering experiment: