NCERT Solutions for Class 9 Science Chapter 4
Structure of the Atom
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-47
Questions No-2
If an atom contains one electron and one proton, will it carry any charge or not?
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An electron is a negatively charged particle, whereas a proton is a positively charged particle.
The magnitude of their charges is equal. Therefore, an atom containing one electron and one proton
will not carry any charge. Thus, it will be a neutral atom.
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Charge of an Atom with One Electron and One Proton:
– Normal Atom: In a neutral atom, the number of protons (positively charged particles) equals the number of electrons (negatively charged particles), resulting in a balanced charge, and the atom remains electrically neutral.
– Scenario Description: An atom containing only one electron and one proton lacks an equal number of electrons to balance the charge of the proton.
– Unbalanced Charge: With one proton (+1 unit) and one electron (-1 unit), there’s no additional electron to counterbalance the proton’s positive charge.
– Resultant Charge: In this case, the atom would carry a net positive charge of +1 unit, as the positive charge of the proton remains unopposed by an equivalent negative charge.
– Identification: Such an atom, with an unbalanced charge, would be referred to as a positively charged hydrogen ion.
Conclusion:
An atom with only one electron and one proton would not be electrically neutral due to the imbalance in charge. Instead, it would possess a net positive charge, making it a positively charged hydrogen ion.