Question

14. One atom of 9F19 contains

Answer 1

One atom of fluorine contains 9 protons, 9 electrons, and 10 neutrons.

• The number of protons in an atom is called its atomic number.
• If an atom is neutral and has no charge on it then it means that the number of protons and neutrons are equal.
• The sum of protons and neutrons is called its mass number.
• The number of neutrons can be calculated by the formula given below.
• Mass number - atomic number = neutrons number.

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