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(D) Rutherford's $\alpha-$ particle scattering experiment led to the following conclusions:$1$. Most of the $\alpha-$ particles passed straight throug

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$(ii)$ and $(iv)$

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(D) Rutherford's $\alpha-$ particle scattering experiment led to the following conclusions:$1$. Most of the $\alpha-$ particles passed straight through the gold foil,indicating that most of the space inside the atom is empty.$2$. $A$ small fraction of $\alpha-$ particles were deflected by small angles,indicating the presence of a positively charged center called the nucleus.$3$. $A$ very small fraction of $\alpha-$ particles rebounded,indicating that the entire mass and positive charge of the atom are concentrated in a very small volume called the nucleus.Statements $(ii)$ and $(iv)$ are direct conclusions of this experiment. Statement $(i)$ was known from $J$.$J$. Thomson's work,and statement $(iii)$ was discovered later by James Chadwick. Therefore,the correct option is $(ii)$ and $(iv)$.

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

Similar Questions

An ion $Y^{3-}$ contains $18$ electrons and $16$ neutrons. Calculate the atomic number and mass number of the element $Y$. Name the element $Y$.

What were the drawbacks of Rutherford's model of an atom?

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 $P$.
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Give a reason to explain why
$(a)$ isotopes of an element show identical chemical properties?
$(b)$ the atomic masses of elements are in fractions?
$(c)$ atoms combine with other atoms?

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Rutherford's $\alpha-$ particle scattering experiment showed that$(i)$ Electrons have negative charge$(ii)$ The mass and positive charge of the atom is concentrated in the nucleus$(iii)$ Neutron exists in the nucleus$(iv)$ Most of the space in atom is emptyWhich of the above statements are correct?