[LINK Full] Subatomic Particle Worksheets And Key.rar

An atom is the smallest unit of matter that contains the properties of a chemical element. This is why atoms are commonly known as the building blocks of chemistry. Atoms are composed of three types of subatomic particles: protons, neutrons, and electrons. The protons and neutrons are found in the atom's nucleus, while the electrons occur in a cloud around this nucleus. These electrons are arranged in various orbitals or shells that each hold a fixed number of electrons, and each subsequent shell is further away from the nucleus than the last. It is the unique combination of these particles that determines the physical and chemical properties of the atoms of each element.

J.J.Thomson discovered a new subatomic constituent of cathode rays in the year 1897. This subatomic particle was later named as electrons. He found that the mass of the particles on the cathode rays is 1800 times lighter than hydrogen, the lightest element. J.J Thomson was awarded the Nobel Prize in Physics for this work. 2b1af7f3a8