Physics, 28.01.2021 16:00 speedyblackmann

A nickel atom has an atomic number of 28 and an atomic mass of 59. What is the structure of this atom?
A. It has a central nucleus composed of 28 protons and 31 neutrons,
surrounded by an electron cloud containing 28 electrons.
B. It has a central nucleus composed of 28 protons and 28 neutrons,
surrounded by an electron cloud containing 31 electrons.
C. It has a central nucleus composed of 31 protons and 28 neutrons,
surrounded by an electron cloud containing 28 electrons.
D. It has a central nucleus composed of 28 protons and 59 neutrons,
surrounded by an electron cloud containing 28 electrons.

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A nickel atom has an atomic number of 28 and an atomic mass of 59. What is the structure of this at...