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Sub-Atomic Particles

Assertion A: ...

Question

Assertion (A): An atom is electrically neutral.
Reason (R): The negative and positive charges are equal in magnitude in an atom.

A

A is true but R is false

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B

Both A and R are true, but R is not the correct explanation of A

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C

Both A and R are false

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D

Both A and R are true, and R is the correct explanation of A

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Solution

The correct option is D Both A and R are true, and R is the correct explanation of A
Option (a) is correct.

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Similar questions

Q. Atoms that have equal number of positive and negative charges are electrically ....................
(a) charged
(b) discharged
(c) neutral
(d) either (a) or (b)

Q. Fill in the blanks.
(a) An atom consists of _______________, ____________ and _____________.
(b) _____________ are negatively charged particles, while ____________ are positively charged and ____________are ____________.
(c) The ____________ at the center of the atom has ___________ and ____________.
(d) The paths of the negatively charged particles in an atom are called ______________.
(e) Each _____________ is a unit of negative electricity.
(f) In an atom, the _____________ and ____________ are equal in number.
(g) The ___________ and ____________ together make up most of the mass of an atom.
(h) The _____________ of an ____________ is negligible.
(i) The atom as a whole is electrically ______________.
(j) An atom with a shortage or surplus of _____________ is called an ____________.

Q. Which of the following statements is/are incorrect with respect to Thomson's atomic model?
I. An atom is electrically neutral.
II. Electrons are distributed in a positively charged sphere.
III. Electrons revolve in circular paths.
IV. The negative and positive charges are equal in magnitude.

What is meant by 'negative and positive charges are equal in magnitude , so the atom as a whoke is neutral' ?

Q. Why neutron is present in a nucleus of an atom even though an atom is electrically neutral because of same number of positive and negative charges ?

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