Astronomers from the University of Turku in Finland and elsewhere have performed a broadband spectral and timing study of an ...

An atom consists of a heavy center, called the nucleus, made of particles called protons and neutrons. An atom has lighter ...

The discovery of a metal-rich star packed with both light and heavy elements hints at exotic stellar explosions and the role of ancient dwarf galaxies in seeding the cosmos with uranium and thorium.

Why You Can’t Combine All The Elements Of The Periodic Table In A Single Compound The reason for this impossibility strikes at something fundamental about the nature of reality.

Show students that you have 80 cards (4 for each of the first 20 elements). Before distributing the cards, explain that each card contains information about electrons and energy levels for the first ...

Key Concepts The periodic table is a chart containing information about the atoms that make up all matter. An element is a substance made up of only one type of atom. The atomic number of an atom is ...

Promethium, a rare earth element, has been a bit of a mystery in the chemistry world, but scientists are finally unraveling ...

Periodic Table Chemistry: Get here the complete information on the periodic table of elements along with the easy tricks to remember their names. Check who invented the modern periodic table and ...

This happens because electrons have a negative charge that interacts with the positive charge of the nucleus of an atom. In a neutral atom, the number of electrons is the same as the number of ...

The debate centers on misbehaving electrons: because of relativistic effects, the outermost electrons orbiting these elements aren’t where they should be according to the periodic table.