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Delyla C.

asked • 09/29/20

Chemistry Periodic Table

The image shows the representation of an unknown element in the periodic table.

A square is shown. Inside the square nine is written at the top righthand side. To the middle left side, Symbol is written. Below it Name is written. And further below near the bottom edge of the square, eighteen point nine nine eight four is written.

Answer Choices:

Based on the representation, which of the following statements about the element is true? (3 points)

The combined number of protons plus electrons is 9.

The number of neutrons in an atom of the element is 10.

The combined mass of neutrons and electrons is 18.9984.

The sum of the masses of protons and electrons is 18.9984.

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