1. The law that "the physical and chemical properties of elements are periodic functions of their atomic weights" was given by   Bohr   Lothar Meyer   Moseley   Mendeleev   Hint Half-n-half Clue   2. The least reactive elements of the periodic table are   Noble Gases   Alkali Metals   Transition Metals   Alkaline Earth Metals   Half-n-half Clue   3. The first element in the modern periodic table is   Hydrogen   Oxygen   Helium   Lithium   Half-n-half Clue   4. The first noble gas in the periodic table is   Neon   Hydrogen   Helium   Argon   Half-n-half Clue   5. The element with atomic weight 14 is   Nitrogen   Boron   Carbon   Oxygen   Half-n-half Clue   6. The horizontal rows in a periodic table are called   Lanthanides   Periods   Atomic Structures   Groups   Half-n-half Clue   7. The vertical rows in a periodic table are called   Alkali Metals   Periods   Groups   Noble Gases   Half-n-half Clue