Test your knowledge and compete with other Live Science readers to see who can come top in our periodic table quiz ... and ...

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

arranged by their atomic number. One never knows when one will need the properties of Rutherfordium in a hurry. See if you can organize the first 25 elements of the periodic table in order in the ...

Einsteinium-255, produced through irradiation in ILL’s high-flux reactor, provided a continuous supply of fermium-255, ...

The periodic table The periodic table is a chart of all the elements arranged in increasing atomic number. Group 1 alkali metals The Group 1 elements, also known as the alkali metals, all react ...

but there were always a few missing blocks in the periodic table. These elements, with atomic numbers of 113, 115, 117, and 118 comprise the missing parts of period 7 – the lowest row – of the ...

SUNAYANA: I also like to think of the atomic number as the address of an element – it tells you how many protons are in the nucleus and also its position in the periodic table. That's what makes ...