Elements

• Atomic number is the number of protons in an atom of an element.
• Mass number is the number of protons and neutrons in the atom of an element
• Formula for calculating the number of neutrons . Number of neutrons = Mass number - Atomic number
• Diatomic elements are elements that only existing pairs
• Examples of diatonic elements

  1. Hydrogen
  2. Nitrogen
  3. Chlorine
  4. Bromine
  5. Oxygen
  6. Fluorine
  7. Iodine
• Elements are pure substances that only have one kind of atom which cannot be broken down into simpler substances