If an atom has an atomic number of 9 and an atomic mass number of 19. How many protons, neutrons, and electron?
If an atom has an atomic number of 9 and an atomic mass number of 19. How many protons, neutrons, and electrons does it have?
- AnthonyLv 76 years agoBest Answer
Atomic number = number of protons = 9
Atomic mass = number of protons + number of neutrons, number of neutrons = Atomic mass - atomic number = 19 - 9 = 10
Number of electrons in neutral atom = number of protons = atomic number = 9
- Anonymous6 years ago
In a neutral atom,atomic number always equal to number of electrons and number protons.And mass number equal to sum of number protons and neutrons.
So there are 9 electrons,9 protons and 10 neutrons.
In a neutral atom,
Atomic number =no of protons =number of electrons
Mass number= number of protons + number of neutrons
- 6 years ago
Your talking about Fluorine.
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- RameshwarLv 76 years ago
number of electrons = number of protons = atomic number = 9
atomic mass =protons+ neutrons = e- + neutrons
so neutrons = A.M - e- = 19 - 9 = 10
the element is FLUORINE [ F ]