1. The least reactive elements of the periodic table are   Alkaline Earth Metals   Alkali Metals   Noble Gases   Transition Metals   Hint Half-n-half Clue   2. Which element has the atomic number 8?   Lithium   Oxygen   Helium   Nitrogen   Half-n-half Clue   3. The first element in the modern periodic table is   Helium   Lithium   Hydrogen   Oxygen   Half-n-half Clue   4. The law that "the properties of elements are periodic functions of their atomic numbers" was given by   Heisenberg   Mendeleev   Moseley   Linus Pauling   Half-n-half Clue   5. The vertical rows in a periodic table are called   Periods   Groups   Noble Gases   Alkali Metals   Half-n-half Clue   6. Elements in the same group have similar   atomic masses   atomic numbers   chemical properties   atomic radii   Half-n-half Clue   7. Elements on the extreme left side of the periodic table are   Metalloids   Transition Elements   Non Metals   Metals   Half-n-half Clue