Along the stair-step line are the metalloids, which have properties of both metals and nonmetals.The elements have an increasing nonmetallic character as one reads from left to right across the table.The boxes for all of the elements are arranged in increasing order of atomic number.The information can be used to predict chemical reactivity.The periodic table of elements is an arrangement of elements according to atomic number and properties.The horizontal rows are called periods.This gives rise to their similar properties and is the basis of periodicity - the repetitive pattern of properties such as boiling point across periods on the table.Elements in the same column (family) of the periodic table contain the same number of electrons in their outer energy levels.The vertical columns in the table are called groups or families.This is the basis for the arrangement of atoms on the periodic table of elements.An atom’s identity is directly related to the number of protons in its nucleus.Each box in the periodic table contains information about the structure of an element.The periodic table of elements is a tool used to organize information about the elements.Elements combine in many ways to produce compounds that make up all other substances on Earth.The remaining elements are artificially produced in a laboratory setting.No element with an atomic number greater than 92 is found naturally in measurable quantities on Earth.There are more than 110 known elements.

Non metals periodic table