Answer:
A change that produces one or more new substances is called
<u>a chemical change</u><u>.</u>
<u></u>
Try this solution, answers are marked with red colour.
Line spectra are obtained when individual elements are heated using a high-voltage electrical discharge. This heating causes excitation of the element and a subsequent emission of distinct lines of colored light are obtained. Each element has its own unique emission line spectrum; therefore, if any of the tested substances were the same, their spectra would match. However, this is not the case so none of the substances are the same.
hope it helps!
