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Standard IX

Chemistry

Rutherford's Model of an Atom

The mass of a...

Question

The mass of an atom resides in:

nucleus

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protons

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electrons

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All of the above

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Solution

The correct option is A nucleus
The mass of an atom resides in its nucleus as it contains protons and neutrons. Atomic mass is the sum of mass of protons and neutrons.

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Similar questions

What did Rutherford conclude regarding the atomic mass?
(i) Mass of the atom is uniformly distributed.
(ii) Nucleus of an atom is much heavier than electron.
(iii) Nearly all the mass of an atom resides at the centre of an atom.
(iv) Nucleus of an atom is lighter than the electron.

( i) Write the subset relation between the sets.

P is the set of all residents in Pune.

M is the set of all residents in Madhya Pradesh.

I is the set of all residents in Indore.

B is the set of all residents in India.

H is the set of all residents in Maharashtra.

( ii) Which set can be the universal set for above sets ?

Q. Assertion :The canonical forms in which the negative charge resides on the electronegative atoms contribute more, but in

B F_{3}

the

p π - p π

back bonding places a positive charge on

F

which is more electronegative than

B

Reason: This disfavor is compensated due to the formation of an additional

π - b o n d

Read the above assertion and reason and choose the correct option regarding it.

Q. The difference in the mass of 100 each mole of sodium atoms and sodium ions is 5.48002 g. Calculate the mass of an electron from the above data.

Consider the following statements:

1. The number of protons in the nucleus of an atom of a given element is called the atomic number of that element.

2. Mass number of an atom is defined as the sum of number of protons and neutrons present in the nucleus of an atom.

3. Atoms of an element that have the same atomic number (Z) but different mass number (A) are called isotopes.

Which of the above statements is incorrectly stated?

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The mass of an atom resides in:

The correct option is A nucleusThe mass of an atom resides in its nucleus as it contains protons and neutrons. Atomic mass is the sum of mass of protons and neutrons.

The correct option is A nucleus
The mass of an atom resides in its nucleus as it contains protons and neutrons. Atomic mass is the sum of mass of protons and neutrons.