Physics, asked by JaydeepsingPatil, 1 month ago

An atom has an atomic number of 19 and a mass number of 39. How many electrons. protons and neutrons does it have?​

Answers

Answered by jpoojary640
1

Answer:

sorry don't know sorry about it

Answered by xesharine4
1

Explanation:

Protons (the atomic number) and neutrons both contribute to the atomic mass. If you, therefore, subtract the number of protons (19) from the atomic mass (39), you are left with the number of neutrons (=20). Hence, option A is correct.

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