atoms of same elements having different mass number

atoms of different elements having same mass number

atoms of same elements having same mass number

atoms of different elements having same number of neutrons

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Earn 100

Deflection back of a few particles on hitting thin foil of gold shows that

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Important Questions on Structure of Atom

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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?

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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 ?

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

The number of protons, neutrons and electrons in

_{71}^{175} Lu

, respectively, are

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

The product obtained after a positron emission from

{}_{31}{Ga}^{68}

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

The correct increasing order of the electronegativity is

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

Isotopes are

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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)

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

The statement related to law of definite proportions is

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

The sum of the total number of neutrons present in protium, deuterium and tritium is

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

Write the name of particle present at the center of electrons in represented Rutherford's model. Write one characteristic of this model.

Question Image

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Chemistry>Physical Chemistry>Structure of Atom>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 = 3.0 \times 10^{8} {ms}^{- 1}

]

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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:

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

Which of the following is an example of Law of multiple proportion?

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Models

In the nuclear reaction

{}_{13}{Al}^{27} + {}_{2}{He}^{4} ⟶ {}_{14}X^{30} + {}_{1}H^{1}, X

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Chemistry>Physical Chemistry>Structure of Atom>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>Structure of Atom>Atomic Models

The ratio of the highest to the lowest wavelength of Lyman series is

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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 $9.10939 \times 10^{- 31} kg$ .
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.