Question

5. Which statement about a neutron is not correct?
A It can be present in different numbers in atoms of the same element.
B It has no electrical charge.
C It is always found in the nucleus of an atom.
D It weighs much less than a proton.​

Answer 1

Answer:

OPTION A

Explanation:

BECAUSE NEUTRONS WILL BE SAME FOR SAME ELEMENTS

Answer 2

Statement (D) is not correct.

• It is a known fact that neutrons can be found in different numbers in atoms of the same element. It is this phenomenon, in fact, that gives rise to isotopes. Isotopes are atoms of the same element that have an equal number of protons but different numbers of neutrons in their nuclei, hence different in atomic mass but possessing similar chemical characteristics. Hence, Statement A is correct.
• An atom is made up of three types of particles- electrons, protons and neutrons. Electrons are negatively charged and revolve around the nucleus. Protons are positively charged and are situated inside the nucleus, alongside neutrons that have zero electrical charge. Hence, statement B is also correct.
• From the point above, it follows that neutrons are found in the nucleus of an atom. Hence, option C is also correct.
• The neutron is slightly heavier than the proton. By estimates, it is heavier by 0.1%. Hence, statement D is incorrect.

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