often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number. Scientists use the periodic ...

The periodic table of elements is a landmark categorization developed in 1869 by the Russian chemist and inventor Dmitri ...

This is the second part of a three-part series written by Carolyn Krause. Many of the elements were synthesized using an Oak Ridge reactor.

Meyer’s table was comprised of 44 elements arranged by valency; Odling’s version arranged 57 elements by their atomic weight. Odling’s table was remarkably similar to the one that Mendeleev had ...

The way we arrange them is in the order of increasing atomic number ... Now, the table is called the periodic table because the elements with similar properties occur at regular intervals.

A chemical element is one of those squares on the periodic table that adorns many a classroom ... It is the number of protons, otherwise known as the atomic number, that determines which element ...

1. Convert kilograms/second to grams per second. 1 kg = 1000 grams. If the mass flowrate is 0.25 kilograms/second, convert ...

More than 75 years after its initial discovery, scientists have created an organometallic molecule containing the transuranium element berkelium. According to a new study, the electronic signature of ...

This puzzle shows many of the elements used to make transistors. The finished puzzle is a section of the periodic table, so the numbers on each tile are their atomic numbers - that means they ...