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.

www.reference.com/article/period-periodic-table-d136127780fc2b7f

The periodic table got its name from the way the elements are arranged in rows, which are called periods. The columns of the table are called groups, some of which have specific names, such as the noble gases and the hal...

www.reference.com/article/did-periodic-table-its-name-e4d608ae7ff948f4

The periodic table classifies chemical elements by their similarities and properties. Each square in the periodic table shows an element's atomic number, its symbol, its name and its atomic weight, which is the number of...

www.reference.com/article/periodic-table-work-851db90f4f2f8be1

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

In a color-coded periodic table of the elements, the box for each element is colored. This color represents the classes of elements, which include metals, metalloids and non-metals. In general, the color blue is used for...

www.reference.com/science/color-coded-periodic-table-d86d4a56165a0abb

In the modern periodic table, elements are arranged by atomic number. They are placed with the lowest atomic number first, and elements with increasing atomic numbers run to the right. They are also arranged in vertical ...

www.reference.com/science/elements-arranged-modern-periodic-table-474e4403f2c39d52