See if you can organize the first 25 elements of the periodic table in order in the quiz below. The periodic table as we know ...

As you move down a group in the periodic table, the covalent radius increases ... screen or shield the outer electrons from the nuclear charge.

Stanford Medicine scientists are generating a periodic table of sorts for psychiatric disorders, providing a better ...

The “lead” of a pencil is actually made of a substance called graphite which is made of carbon atoms. The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and ...

Protons are in the _____ of an atom. Their relative charge is _____. The particles that move around outside the nucleus are called _____. Their relative charge is ...