Jorge's experiment involved which of the following?

C. A physical change.

Explanation:

Given the image shown below.

It can be seen that the experiment is about phase changes of a substance. And phase changes of a substance is being done or carried out when the substance has passed through any of the processes such as melting, boiling, freezing, condensing, depositing, or sublimation.

And since these changes in the phase of a substance do not change the substance's chemical nature. It is called a physical change.

Therefore, in this case, Jorge's experiment involved "A physical change."

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

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