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

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Three elements $A, B$ and $C$ have the same number of protons in their nuclei, but the number of neutrons are different. Then, according to Mendeleev's periodic law, the position(s) of $A, B$ and $C$ in the periodic table will be:

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Important Questions on Structure of Atom

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

The isoelectronic pair is:

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

Which of the following pairs of iron are isoelectronic and isostructural?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

The pair of atoms having the same number of neutrons is

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

The isoelectronic set of ions is:

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

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>Structure of Atom>Some Important Atomic Terms

O^{2 -}

is isoelectronic with

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

Among the following species which option contains all isoelectronic species?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

In the following sets of ions, which one is not isoelectronic with the rest of the species?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

In the nuclear reaction

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

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

Isotopes are

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

B e^{2 +}

is isoelectronic with which of the following ions?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

The number of protons, neutrons and electrons in

_{71}^{175} Lu

, respectively, are

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

The number of electrons, protons and neutrons in a species are equal to

10, 11

and

12

respectively. The proper symbol-of the species is

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

Among the following, the set of isoelectronic ions is

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

Which of the following are isoelectronic species?

I. $\overset{+}{C} H_{3}$

II. ${NH}_{2}^{-}$

III. ${NH}_{4}^{+}$

IV. ${NH}_{3}$

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

From the following pairs of ions which one is not an iso-electronic pair?

HARD

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

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?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

The product obtained after a positron emission from

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

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

Which of the following conclusions could not be derived from Rutherford's

α

-particle scattering experiment:

EASY

Chemistry>Physical Chemistry>Structure of Atom>Some Important Atomic Terms

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)

Three elements A, B and C have the same number of protons in their nuclei, but the number of neutrons are different. Then, according to Mendeleev's periodic law, the position(s) of A, B and C in the periodic table will be:

Important Questions on Structure of Atom

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Three elements $A, B$ and $C$ have the same number of protons in their nuclei, but the number of neutrons are different. Then, according to Mendeleev's periodic law, the position(s) of $A, B$ and $C$ in the periodic table will be: