1. The Law of Octaves was given by   Mendeleev   Dobereiner   John Newlands   Bohr   Hint Half-n-half Clue   2. The horizontal rows in a periodic table are called   Atomic Structures   Groups   Periods   Lanthanides   Half-n-half Clue   3. Magnesium has an atomic number of   12   24   10   16   Half-n-half Clue   4. Elements on the extreme left side of the periodic table are   Non Metals   Metals   Transition Elements   Metalloids   Half-n-half Clue   5. The element with atomic weight 14 is   Carbon   Boron   Nitrogen   Oxygen   Half-n-half Clue   6. Which element has the atomic number 8?   Lithium   Oxygen   Helium   Nitrogen   Half-n-half Clue   7. The first element in the modern periodic table is   Oxygen   Hydrogen   Lithium   Helium   Half-n-half Clue