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Standard IX

Chemistry

Atomic Number

Select the su...

Question

Select the sub-atomic particles that are present in the nucleus of an atom.

A. Electrons

B. Protons

C. Neutrons

Only B

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Only C

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Both A and B

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Both B and C

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Solution

The correct option is D
Both B and C

Both protons and neutrons are present in the nucleus of an atom. Electrons revolve around the nucleus.

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Similar questions

Which sub-atomic particles of an atom are present in the nucleus of an atom?

A = Electrons

B = Protons

C = Neutrons

Which of the following statement is correct about the atom of an element ?

(a) an atom can have only protons and neutrons but no electrons.

(b) an atom can have only electrons and neutrons but no protons

(d) an atom must always have a proton, neutron and electron

An atomic nucleus A is composed of 84 protons and 128 neutrons.

The atomic nucleus A emits an alpha particle and is transformed into nucleus B. The atomic nucleus B emits a $β$ - particle and is transformed into a nucleus C. What is the composition of atomic nucleus C?

Fill in the blanks in the following statements :

(a) The number of protons in the nucleus of an atom is called its ....................

(b) The total number of protons and neutrons in the nucleus of an atom is called its ....................

(d) An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of the atom is ....................

(e) If the nucleus of an atom has atomic number 17, mass number 37 and there are 17 electrons outside the nucleus, the number of neutrons in it is ....................

(f) Almost all the mass of an atom is concentrated in a small region of space called the ....................

(g) Cathode rays are a beam of fast moving ....................

(h) The anode rays obtained from hydrogen gas consist of particles called ....................

(i) The maximum number of electrons that can be accommodated in L shell are ....................

(j) The maximum number of electrons that can go into the M shell is ....................

(k) The subatomic particle not present in a hydrogen atom is ....................

(l) The electron has .................... charge, the proton has .................... charge, and the neutron has .................... charge.

State whether True or False.

(a) J.J. Thomson proposed that the nucleus of an atom contains only nucleons.
(b) A neutron is formed by an electron and a proton combining. Therefore, it is neutral.
(c) The mass of an electron is about

\frac{1}{2000}

times that of a proton.

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Select the sub-atomic particles that are present in the nucleus of an atom. A. Electrons B. Protons C. Neutrons

The correct option is D Both B and C Both protons and neutrons are present in the nucleus of an atom. Electrons revolve around the nucleus.

Select the sub-atomic particles that are present in the nucleus of an atom.

A. Electrons

B. Protons

C. Neutrons

The correct option is D
Both B and C

Both protons and neutrons are present in the nucleus of an atom. Electrons revolve around the nucleus.