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 ...

Why did they form at that time? Astronomers know from observing distant exploding stars that the size of the universe has ...

Chemical reactions occur when elements or compounds combine and create new compounds. Elements are substances that contain only one type of atom and are represented by unique symbols on the periodic ...

The formula H₂O shows that water is made from two atoms of hydrogen (H) bonded to one atom of oxygen (O). Katie: Time for some science. And today it's a chemistry classic, the periodic table. And here ...

All the elements in the Periodic Table are made from different atoms, and the structure of these atoms results in a gamut of phenomena from radioactive decay to nuclear power. When you purchase ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Matter is made up of very small parts called atoms. Atoms can combine in different numbers and in different ways to make different molecules. Atoms and molecules make up all of the different ...

One of the most obviously quantum features of our universe is the discrete emission spectra we see from atoms. Every element in the periodic table absorbs and emits light of very particular ...

(CNN) -- As though it wasn't hard enough to memorize the names and atomic weights of 117 elements in the periodic table. Scientists have now confirmed another. Actually, researchers from Lund ...

The planet's core could be a mushy mix of solid and liquid. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Earth's inner core may be filled with ...