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

EASY

Earn 100

An $α$ -paticle approaches the target nucleus of copper (Z = 29) in such a way that the value of impact parameter is zero. The distance of closest approach will be

72.73% studentsanswered this correctly

Important Questions on Atomic Structure

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

The statement related to law of definite proportions is

EASY

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 = 3.0 \times 10^{8} {ms}^{- 1}

]

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

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)

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

The correct increasing order of the electronegativity is

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

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

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

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

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

{}^{23}{Na}

atom contain?

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

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

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

Electron Is invented by

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

The number of protons, neutrons and electrons in

_{71}^{175} Lu

, respectively, are

MEDIUM

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:

EASY

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?

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