ARTICLES

A period on the periodic table is a horizontal grouping of elements running from the left to right of the table. Several trends are observed going from the left side of the periodic table to the right.

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The periodic table of elements is a chemistry reference that lists elements by increasing atomic number, which typically correlates to their atomic masses. The atomic number increases from left to right as well as from t...

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The periodic table arranges the known elements in order of increasing atomic number, which typically coincides with increasing atomic mass. Different rows on the table are known as periods. The period number assigned to ...

www.reference.com/article/elements-periodic-table-categorized-a18fece6f66529b7

SIMILAR ARTICLES

The observed periodic trends in electron affinity are that electron affinity will generally become more negative, moving from left to right across a period, and that there is no real corresponding trend in electron affin...

www.reference.com/science/observed-periodic-trends-electron-affinity-c06eed6903a10fd0

The Roman numerals on a periodic table of elements define the chemical group of the elements in that column and identify the number of valence electrons of each element. Group IA elements have one valence electron; group...

www.reference.com/science/roman-numerals-periodic-table-523e5920ccf6e6dc

Some elements on the periodic table are oxygen, helium, arsenic and fluorine. Oxygen is an odorless, tasteless and colorless gas at room temperature, but is bright blue as a liquid. Oxygen is a very reactive element and ...

www.reference.com/article/elements-periodic-table-7f47a96a06c92b5e

The periodic table was invented by chemist Dmitri Mendeleev to organize and compare elements and understand their relations with each other. Mendeleev created the periodic table between 1868 and 1870 while writing his bo...

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