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

But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can ...

That’s why this periodic table clock really caught our eye. [gocivici]’s idea is a simple one: light up three different elements with three different colors for hours, minutes, and seconds ...

For example, lithium (Li), sodium (Na) and potassium (K ... However, the modern periodic table arranges the elements by increasing atomic number, rather than atomic mass. Mendeleev recognised ...

There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...

For example, lithium (Li), sodium (Na) and potassium (K ... However, the modern periodic table arranges the elements by increasing atomic number, rather than atomic mass. Mendeleev recognised ...

These are almost one-quarter of the periodic table ... elements that our bodies need in larger amounts: oxygen, carbon, hydrogen, nitrogen, phosphorus, sulphur, chlorine, potassium, sodium ...

This year we celebrate the 150 th anniversary of Mendeleev’s achievement in formulating the structure of the periodic table that we use today. He announced his structure in 1869, but the challenge of ...

The periodic table captures a subtle pattern that runs ... is a reactive metal — just like sodium (element number 11) and potassium (number 19). A good way to think about it is to imagine ...

You interact with about two-thirds of the elements of the periodic table every day. Some, like carbon, oxygen, and nitrogen, make up our bodies and the air we breathe. Yet there is also a class of ...

Today, 13.8 billion years after the Big Bang, stars have converted about 2 per cent of the universe’s hydrogen and helium into other elements ... guide to the periodic table “There ...