Atom

• Atomic Number is?

  Number of Protons = Number of Electrons
• Mass number is?


  Number of Protons + Number of Neutrons
• What is an atom?

  Smallest Unit of Matter
• How is a molecule formed?

  Molecule is formed when two or more atoms join together chemically.
• What charge does the Nucleus have?

  Nucleus always has a positive charge.
• Why do Electrons not fly away?

  Electrons don't fly away due to the strong attraction between it and the proton. This nuclear force holds electrons in place.
• What are ions?


  Charged particles.
• How are ions formed?

  Ions are formed when atoms gain or lose electrons to have a full outer shell with valence electrons.
• What are cations?


  Positively charged ions are called cations
• What are Anions?


  Anions are negatively charged ions.