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enyata [817]
3 years ago
5

Someone help me please i need to finish this

Physics
2 answers:
Ilya [14]3 years ago
8 0

Answer:

D. A zinc Zn contains 30 protons inside the nucleus and 30 electron outside the nucleus

gavmur [86]3 years ago
5 0

Answer:

the last option is correct

Explanation:

see I won't explain all the points but will tell you the concept being used.

  • protons and neutrons are inside the nucleus in an atom while the electrons are outside the nucleus.

  • the mass number of an atom is equal to the sum of number of electrons and neutrons in an atom
  • atomic number is equal to the number of electrons which is equal to the number of protons in an atom
  • no. of electrons/ protons is always less than that of neutrons and they're almost equal( a large difference ain't obtained between the number of electrons and that of neutrons.

since, the rest of the options are violating the above rules they're incorrect

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