How many periods are in the periodic table of elements
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. In the Periodic Table, how many periods include the elements of atomic numbers 1-18
Asked by admin @ in Chemistry viewed by 317 People
. In the Periodic Table, how many periods include the elements of atomic numbers 1-18
Answered by admin @
Answer:
There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements. Periods 4 and 5 have 18 elements.
Explanation:
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