C. True or False
1. Valence electron are all electrons in the outer shell or energy levels of an atom.
2. They are called noble gases because they are so magnificent that, in general, they
don't react with anything,
3. Metals readily react with water and dilute acids, during these reactions Helium gas
are produced
4. Only Helium are two valence electrons from Noble gases.
5. Platinum is a Most reactive metal element.​