Noble gases react very unwillingly, because the outermost shell of electrons orbiting the nucleus is full, giving these gases no incentive to swap electrons with other elements. As a result, there are very few compounds made with noble gases. Like its noble gas comrades, neon is odorless and colorless.
Similar chemical properties
(OPTION C)
What your going to do is take away the lowest number form the highest and subtract. Thats your answer...