The Atom

• Atoms are referred to as the building blocks of all living matter
• An atom is the smallest part of an element that can exist and still have properties of that element.
• All atoms of an element are identical to each other.
• The first elements of the periodic table are: Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium.
• Elements are made up of only one type of atom.
• all atoms are identical to each other
• an element is a substance that can't be broken down chemically into a simpler substances and are primary constituents of matter
• An atom is made up of three atom particles- protons, neutrons and electrons.
• Electron - negatively charged particle found outside the nucleus of an atom.
• Neutron - neutral (uncharged) particle found in the nucleus of an atom.
• Proton - positively charged particle found in the nucleus of an atom.
• An atom is made up of two parts: the large central nucleus and the shells/orbitals around it.
• shells are an area of negative charge
• Overall and atom has no charge a the number of protons and electrons are always the same
• Atomic Number = Protons + Neutrons
• Mass Number = Protons + Neutrons
• The atomic mass of an element is calculated by adding together the masses of all its constituent particles, including neutrons.
• Electrons are entered singally and then in pairs in order of top, bottom, left, right.