Chemistry – Atoms, elements and compounds - Atomic structure and the Periodic Table | e-Consult
Atoms, elements and compounds - Atomic structure and the Periodic Table (1 questions)
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Calculation of Protons: Mass number = Number of protons + Number of neutrons. Therefore, Number of protons = Mass number - Number of neutrons = 39 - 19 = 20 protons.
Symbolic Representation: The full symbolic representation of an isotope is written as: Mass numberAtomic numberElement symbol. In this case, the isotope is 3919K. This indicates that it is an isotope of potassium (K) with 19 protons and a mass number of 39.