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Answer:
have the same number of electron energy levels
Explanation:
All of the elements in the same period have the same number of atomic orbitals that are occupied by electrons that are in constant motion. For example the elements in the first period have one orbital for its electrons. The elements in the second period have two orbitals for their electrons. As you move down the table, every row adds an orbital. At this time, there is a maximum of seven electron orbitals.
SOLAR, ENERGY CAN BE USED DIRECTLY TO HEAT SPACE, OR IT CAN BE CONVERTED TO ELECTRICITY ..
Psychology emerges as a separate discipline. During the mid-1800s, a German physiologist named Wilhelm Wundt was using scientific research methods to investigate reaction times. He later opened the worlds first psychology lab in 1879 at University of Leipzig.
This is because elements are pure substances with only one atom. When two or more elements are combined, you get compound elements; which allows for more substances to be created.
