Which of the following representations is correct for an atom X with 28 electrons and 30 neutrons?
Question 1 Report
Which of the following representations is correct for an atom X with 28 electrons and 30 neutrons?
Answer Details
The correct representation for an atom X with 28 electrons and 30 neutrons is \(^{58}_{28} X\).
The atomic number of an element is the number of protons in its nucleus. Since the element X has 28 electrons, which are equal to the number of protons in its nucleus, the atomic number is 28.
The mass number of an element is the total number of protons and neutrons in its nucleus. Since the element X has 30 neutrons in addition to its 28 protons, the mass number is 58.
Therefore, the correct representation of the atom X is \(^{58}_{28} X\). Option (d) is the correct representation.
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