Write the electronic configuration of an element X whose
atomic number is 15. Draw its atomic structure. Calculate number of
protons and number of electrons in this atom.
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Answer:
Z
A
X, where A stands for the atomic mass number which is the sum of protons and neutrons in the atom of an element and Z stands for an atomic number of the element which is the number of electrons in an atom of an element.
Atomic mass = Number of electrons + Number of neutrons
Atomic number = Number of protons = Number of electrons
Therefore, atomic mass =15+16=31 and atomic number is =15.
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4
phosphorus is the element
no of protons = 15
no of neutrons = 16
atomic mass = 31
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