The periodic table is 150 years old, so we've looked at some of its most intriguing elements. ... Is it a plane? No, it’s krypton - although unfortunately it has nothing to do with Superman.

You’re probably familiar with the periodic table of elements, which adorns the wall of every high-school science classroom. This comprehensive table charts elements by categories and ...

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

Related: New periodic table shows the cosmic origins of your body’s elements Each element on the interactive table comes with a description and a list of a few different uses.

Since Mendeleev's time, scientists have discovered new elements, expanding the periodic table. The most recent additions include nihonium, moscovium, tennessine, and oganesson, which were officially ...

He and his colleagues have used a krypton isotope, krypton-81, with a half-life of 230,000 years to date ice cores in the Antarctic back to 120,000 years old. (The oldest Antarctic ice ever found ...

Give each student a Periodic Table of Energy Levels activity sheet. This table contains energy level models for the first 20 elements. The electrons are included only for the atoms at the beginning ...

Elements in the periodic table are arranged in order of increasing atomic number. The atomic number represents the number of protons in an atom's nucleus, uniquely identifying each element.

He started his talk by discussing the first modern periodic table produced in 1869 by Dmitri Ivanich Mendeleev (1834-1907), a Russian chemist who developed the periodic classification of the elements ...