1. The first noble gas in the periodic table is   Hydrogen   Neon   Helium   Argon   Hint Half-n-half Clue   2. Mercury is a   Non metal   Noble Gas   Metal   Lanthanide   Half-n-half Clue   3. The least reactive elements of the periodic table are   Alkaline Earth Metals   Alkali Metals   Transition Metals   Noble Gases   Half-n-half Clue   4. The element with atomic number 6 is   Carbon   Boron   Neon   Oxygen   Half-n-half Clue   5. The law that "the physical and chemical properties of elements are periodic functions of their atomic weights" was given by   Mendeleev   Lothar Meyer   Moseley   Bohr   Half-n-half Clue   6. Magnesium has an atomic number of   16   24   10   12   Half-n-half Clue   7. The Law of Octaves was given by   Mendeleev   John Newlands   Bohr   Dobereiner   Half-n-half Clue