In an atom, positively charged particles called are present at the centre and revolve around it.

protons

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electrons

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neutrons

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nuclei

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Solution

The correct options are
A protons
B electrons
Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus which is present at the centre of the atom contains protons (positively charged particles) and neutrons (neutral particles). Electrons which are negatively charged revolve around the nucleus.

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Similar questions

Q. In an atom, positively charged particles called ______ are present at the centre and ______ revolve around it.

Q. Following conclusions were drawn from the given figure :
I. There is a positively charged centre in an atom called the nucleus.
II. An atom consists of a positively charged sphere and the electrons are embedded in it.
III. The electrons revolve around the nucleus in well-defined orbits.
IV. The size of the nucleus is very small as compared to the size of the atom
V. Only certain special orbits known as discrete of electrons are allowed inside the atom.
Choose the correct statements.

Everything is made of atoms and every atom has a nucleus composed of positively charged particles called protons, with some neutrally charged particles known as neutrons. The particles that orbit around the nucleus that is negatively charged are known as________.

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. Why according to Rutherford positively charged particles are concentrated at the centre of the atom when alpha particles were sent through a thin metal foil.

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