Katie: Time for some science. And today it's a chemistry ... We call these letters symbols. And an element is a pure substance made from only one type of atom. And there are quite a lot of elements.

Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol. The periodic table’s arrangement also allows ... Today, with 118 known ...

When it comes to science, chemistry is elemental ... while also giving each individual element its own chemical symbol. In ...

Each entry contains the atomic number, chemical symbol, and atomic mass to two decimal places on elements where data is available. Undefined cells contain a space. Row 9 is blank, and the content in ...

This year, the periodic table of chemical elements celebrates its ... So, what's so special about this iconic symbol of science? Dr Peter Wothers of the University of Cambridge is an expert ...