Multiple choice general knowledge science & technology

If an element F has mass number as 19 and atomic number as 9 then what are the number of protons and neutrons that it contains respectively .

  1. Protons = 10 , Neutrons = 9

  2. Protons = 9 , Neutrons = 19

  3. Protons = 9 , Neutrons = 10

  4. Neutrons =9 , Protons = 19
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In an atom, the atomic number equals the number of protons. Mass number equals protons + neutrons. For element F with atomic number 9 and mass number 19: protons = 9, neutrons = 19-9 = 10. Option C is correct.

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