Across a period from left to right, the covalent radius decreases. As you move from left to right across the periodic table, atoms have more electrons in their outer energy level and more protons ...

However, he is remembered for his search for a pattern in inorganic chemistry. Just four years before Mendeleev announced his periodic table, Newlands noticed that there were similarities between ...

It allows us to spot patterns and make predictions about other elements.. While you're watching, look out for where different elements are found in the periodic table. Mrs Roberts: So, here I have ...

February 7 is National Periodic Table Day, when we celebrate the efforts of scientists over the centuries to figure out how different elements ...

The periodic table of elements (often known simply as ... In 1869, he noticed that the elements exhibited periodicity or a pattern of properties in intervals. (He was, apropos of nothing, also ...