1. The element with atomic number 6 is   Carbon   Oxygen   Boron   Neon   Hint Half-n-half Clue   2. The law that "the physical and chemical properties of elements are periodic functions of their atomic weights" was given by   Mendeleev   Moseley   Bohr   Lothar Meyer   Half-n-half Clue   3. Which element has the atomic number 8?   Helium   Oxygen   Nitrogen   Lithium   Half-n-half Clue   4. Elements in the modern periodic table are arranged on the basis of their   Boiling Point   Chemical Symbols alphabetically   Atomic Number   Atomic Mass   Half-n-half Clue   5. Which metal has atomic number 3?   Boron   Beryllium   Lithium   Sodium   Half-n-half Clue   6. The horizontal rows in a periodic table are called   Periods   Groups   Lanthanides   Atomic Structures   Half-n-half Clue   7. The law that "the properties of elements are periodic functions of their atomic numbers" was given by   Moseley   Heisenberg   Linus Pauling   Mendeleev   Half-n-half Clue