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Question
Which of the following statement is always correct?
Options
an atom has equal number of electrons and protons
an atom has equal number of electrons and neutrons
an atom has equal number of protons and neutrons
an atom has equal number of electrons, protons and neutrons
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Solution
An atom has equal number of protons and electrons
An atom always has equal number of protons and electrons in order to maintain electrical neutrality.
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A ________ is a sub-atomic particle with no charge and unit mass.
What is meant by the term subatomic particles?
