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CHEMISTRY

JAMB 2001 - Question 5

Chemistry 2001 JAMB Past Questions - Question 5: A particle that contains 9 protons, 10 neutrons and 10 electrons is a

Choose the correct answers from the options given.

A particle that contains 9 protons, 10 neutrons and 10 electrons is a

A: negative ion

B: positive ion

C: neutral atom of a non-metal

D: neutral atom of a metal.

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Correct Answer

Explanation

A particle with 9 protons, 10 neutrons, and 10 electrons is an ion of fluorine, denoted as F^- (fluoride ion). The number of protons determines the element, and since there are 9 protons, it corresponds to fluorine on the periodic table. The number of electrons in a neutral atom of fluorine is 9, but in this case, there are 10 electrons, indicating that it has gained an extra electron, resulting in a negative charge, making it an ion.