Elements emit colours when heated because electrons in atoms can have only certain allowed energies.Heating an atom excites its electrons and they jump to higher energy levels. When the electrons return to lower energy levels, they emit energy in the form of light. Every element has a different number of electrons and a different set of energy levels. Thus, each element emits its own set of colours. See, for example, mercury and neon above. Those colours are as distinctive to each element as fingerprints are to people.
B.Autonomous(the ethnic groups have had autonomy
Answer:
Leakage current is the unintended loss of electrical current or electrons.
Explanation:
The answer is, A. seafloor spreading occurs
Answer : Hopi.
Explanation : The Hopi tribe who are a Native American tribe, are the ones who primarily lived on the Hopi Reservation in northeastern Arizona.
These were the group of people who believed that humans emerged from a hole in the earth.
