The periodic table is a chart that shows all the elements. It's like a big treasure map that helps scientists understand the building blocks of everything around us. Elements are grouped into ...

An element is a substance that is made up of only one type of atom close atomThe smallest particle of an element. We often think of atoms as tiny spheres, but in fact they are made from smaller ...

But the periodic table didn’t actually start with Mendeleev. Many had tinkered with arranging the elements. Decades before, chemist John Dalton tried to create a table as well as some rather ...

150 years ago the periodic table was a massive step forward for science. And today it still helps us make sense of the world around us. Everything is made up of 'elements' such as oxygen, gold and ...

An extended periodic table was suggested by Glenn T Seaborg in 1969. What is an extended periodic table? An extended periodic table was suggested by Glenn T Seaborg in 1969. It’s a logical extension ...