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The periods in the Periodic Table tell you the energy level where the last electrons are being added. So, in period 1, the outermost electrons are in the first energy level or shell. In the 3rd period, the outermost electrons reside the the 3rd energy level, and so on.
What else can I help you with?
Which periods have the same number of elements?
Period 4 and period 5 of the periodic table have the same number of elements. There are 18 elements in each period. While some elements in period 4 are calcium, iron, and zinc, elements in period 5 are tin, antimony, and iodine.
What information does the geologic time scale provide and what are the major divisions of geological time?
The geologic time scale provides a timeline of Earth's history, dividing it into periods based on significant events and changes in the planet's environment. The major divisions of geological time are eons, eras, periods, epochs, and ages, each reflecting different intervals of time with distinct characteristics and geological events.
What piece of information would best help to identify the element?
The atomic number of the element would be the most helpful piece of information for identifying it, as each element has a unique atomic number that corresponds to the number of protons in its nucleus.
How many periods are in each era?
there are different periods in each era. In the Cenozoic era, there are 2 periods, Quaternary and Tertiary. Mesozoic era has 3 periods, Cretaceous, Jurassic, and Triassic. Paleozoic has 7 periods, Permian, Carboniferous, Devonian, Silurian, Ordovician, and Cambrian. Precambrian is just the present, no time periods in it.
Is the order of elements in the periodic table based on the number of protons in the nucleus?
Yes, the elements in the periodic table are arranged in order of increasing atomic number, which is determined by the number of protons in the nucleus. This organization allows for grouping elements with similar properties in columns and periods.
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What information on the periodic table does the period number help you with?
Period number describes the total number of shells. There are 7 periods in periodic table.
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