During physical changes, matter always retains its chemical properties.
D. a warm front causes rain showers to occur over a particular area for several days
Answer:
the answer is C4H10 I hope I helped
When a specific amount of energy is emitted when excited electrons in an atom in a sample of an element return to the ground state, this emitted energy can
<span>be used to determine the "identity of the element".</span>
