The periodic table, also called the periodic table of elements, is an organized arrangement of the 118 known chemical elements. The chemical elements are arranged from left to right and top to bottom ...

There are lots of different substances but only just over a hundred elements. An element is a substance that is made up of only one kind of atom. The atoms in a particular element are the same as each ...

New research reveals that nickel and urea once throttled Earth’s earliest oxygen producers, delaying the planet’s ...

After two decades of debate, scientists are getting closer to figuring out exactly what the sun — and thus the whole universe — is made of. The sun is mostly composed of hydrogen and helium. There are ...

When the Rosetta spacecraft swooped into orbit around a comet in 2014—the first mission to do so—it noticed something strange. The barbell-shaped lump of rock was shedding molecules of oxygen, and ...

All organisms on Earth ride upon a "ferrous wheel" made of different forms of iron that are essential for life. Aa Aa Aa Biogeochemical cycles describe pathways by which chemical elements move through ...

Chinese scientists say they have developed an AI chemist that can create catalysts for oxygen production from Martian meteorites – a move they hope could pave the way to sustaining long stays on the ...

You may have noticed that the rock formations are very different colors. The rock formations on the left are from Red Rock State Park in Texas, and on the right is El Capitan Mountain in Yosemite ...

Everything we can see and touch, and quite a lot that we can’t as well, is made of tiny particles called atoms. Some substances, like particles of this iron, contain only one kind of atom. Iron is an ...