Problem: Part ASpecify the number of protons, neutrons, and electrons in the neutral atom copper-64.Enter your answers as integers separated by commas.Part BThe ion S2− has _____ protons and _____ electrons.Enter your answers as integers separated by a comma.Part CWhat isotope has 17 protons and 18 neutrons?Enter the name of the element followed by a hyphen and the mass number (e.g., uranium-234).Part DWhich element does X represent in the following expression: 5525X?Enter the chemical symbol of the element.

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Problem Details

Part A

Specify the number of protons, neutrons, and electrons in the neutral atom copper-64.

Enter your answers as integers separated by commas.


Part B

The ion S2− has _____ protons and _____ electrons.

Enter your answers as integers separated by a comma.


Part C

What isotope has 17 protons and 18 neutrons?

Enter the name of the element followed by a hyphen and the mass number (e.g., uranium-234).


Part D

Which element does X represent in the following expression: 5525X?

Enter the chemical symbol of the element.

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