(B) The proton was discovered by $E. Goldstein$ in $1886$ through his canal ray experiments.The neutron was discovered by $J. Chadwick$ in $1932$ when

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Protons by $E. Goldstein$ and neutrons by $J. Chadwick$

(B) The proton was discovered by $E. Goldstein$ in $1886$ through his canal ray experiments.The neutron was discovered by $J. Chadwick$ in $1932$ when he bombarded beryllium with alpha particles.Therefore,the correct association is that protons were identified by $E. Goldstein$ and neutrons by $J. Chadwick$.

Class 9 Science STRUCTURE OF THE ATOM Mix Example - STRUCTURE OF THE ATOM

Easy

The presence of protons and neutrons at the center of the atom was suggested by:

A
Protons by $J. Chadwick$ and neutrons by $E. Goldstein$
B
Protons by $E. Goldstein$ and neutrons by $J. Chadwick$
C
Protons by $E. Goldstein$ and neutrons by $J.J. Thomson$
D
Protons by $J. Chadwick$ and neutrons by $J.J. Thomson$

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Class 9

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Chapter

STRUCTURE OF THE ATOM

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Mix Example - STRUCTURE OF THE ATOM

Find out the valency of an element $X$ having atomic number $16$.

Medium

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Study the table given below and answer the questions that follow:

Particle Electrons Protons Neutrons

$M$ $2$ $3$ $4$

$N$ $10$ $9$ $10$

$O$ $8$ $8$ $8$

$P$ $8$ $8$ $10$

$(a)$ Write the mass numbers of particles $M, N, O$ and $P$.
$(b)$ Select a cation and an anion from the above table.

Particle	Electrons	Protons	Neutrons
$M$	$2$	$3$	$4$
$N$	$10$	$9$	$10$
$O$	$8$	$8$	$8$
$P$	$8$	$8$	$10$

Medium

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$(a)$ $_{12}^{24} Mg$ and $_{12}^{26} Mg$ are symbols of two isotopes of magnesium. Compare atoms of these isotopes with respect to:
$(i)$ composition of their nuclei.
$(ii)$ electronic configuration and valency.
$(b)$ Give the reason why two isotopes of magnesium have different mass number.

Medium

View Solution

State whether the following statement is true or false:
The relative number and kinds of atoms are varying in a given compound.

Easy

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Mention the postulates of Niels Bohr put forth to overcome the objections raised against Rutherford's atomic model.

Medium

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The presence of protons and neutrons at the center of the atom was suggested by:

Similar Questions

Find out the valency of an element $X$ having atomic number $16$.

Study the table given below and answer the questions that follow: Particle Electrons Protons Neutrons $M$ $2$ $3$ $4$ $N$ $10$ $9$ $10$ $O$ $8$ $8$ $8$ $P$ $8$ $8$ $10$ $(a)$ Write the mass numbers of particles $M, N, O$ and $P$.$(b)$ Select a cation and an anion from the above table.

$(a)$ $_{12}^{24} Mg$ and $_{12}^{26} Mg$ are symbols of two isotopes of magnesium. Compare atoms of these isotopes with respect to:$(i)$ composition of their nuclei.$(ii)$ electronic configuration and valency.$(b)$ Give the reason why two isotopes of magnesium have different mass number.

State whether the following statement is true or false:The relative number and kinds of atoms are varying in a given compound.

Mention the postulates of Niels Bohr put forth to overcome the objections raised against Rutherford's atomic model.

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Study the table given below and answer the questions that follow:

Particle Electrons Protons Neutrons

$M$ $2$ $3$ $4$

$N$ $10$ $9$ $10$

$O$ $8$ $8$ $8$

$P$ $8$ $8$ $10$

$(a)$ Write the mass numbers of particles $M, N, O$ and $P$.
$(b)$ Select a cation and an anion from the above table.

$(a)$ $_{12}^{24} Mg$ and $_{12}^{26} Mg$ are symbols of two isotopes of magnesium. Compare atoms of these isotopes with respect to:
$(i)$ composition of their nuclei.
$(ii)$ electronic configuration and valency.
$(b)$ Give the reason why two isotopes of magnesium have different mass number.

State whether the following statement is true or false:
The relative number and kinds of atoms are varying in a given compound.