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What is the mass number (A) of an atom that has an atomic number (Z=26) with 29 neutrons and 26 electrons?​

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  • The mass number (A) of this atom is 55

Atom information–

  • Atomic number (Z) = 26
  • Protons (p⁺) = 26
  • Neutrons (n⁰) = 29
  • Electrons (e⁻) = 26

  • The atomic number (Z) of an atom is the number of protons (p⁺) it has

  • The mass number (A) of an atom is characterized by the sum of the amount of protons (p⁺) with its neutrons (n⁰)

Substituting values –

[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf A=p^{+}+n^{0}[/tex]

[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf A=26+29[/tex]

[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf A=55[/tex]

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