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Mar 7, 2018 · In chemistry, the term period refers to a horizontal row of the periodic table. Elements in the same period all have the same highest unexcited electron energy level or same ground state energy level. In other words, each atom has the same number of electron shells.
- Anne Marie Helmenstine, Ph.D.
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What is a period on the periodic table?
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A period on the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor. Arranged this way, elements in the same group (column) have similar chemical and physical properties, reflecting the periodic law.
Jun 23, 2021 · Groups and periods organize elements on the periodic table of the elements. A group is a vertical column down the periodic table, while a period is a horizontal row across the table. Both groups and periods reflect the organization of electrons in atoms.
Jul 23, 2020 · In chemistry, periodicity refers to repeating trends in element properties on the periodic table. Basically, what this means is if you drop down a row (period) on the table and move across it, elements follow the same trend as other periods.
A period is a horizontal row of elements on the periodic table. For example, the elements sodium (Na Na) and magnesium (Mg Mg) are both in period 3. The elements astatine (At At) and radon (Rn Rn) are both in period 6.
May 28, 2024 · A period is a horizontal (left-to-right) row on the periodic table. Each period is given a numerical value, beginning with "1," which is assigned to the top row. The period number increases by one for every additional row, up to a maximum of 7.
Periods are horizontal rows of the periodic table. They represent elements having the same number of electron shells or energy levels. However, each element has one more proton than its preceding element. Thus, the periods are arranged according to the increasing atomic number of the elements.
