Noble gases are used in many situations where a safe and constant environment must be maintained. For example, helium is used to provide a protective atmosphere for making fiber optics and semiconductors. Argon is used to fill incandescent and flourescent light bulbs to prevent oxygen from corroding the hot filament. Why are noble gases used in these situations?

A
Nobel gases do not have a complete valence electron shell making them unstable and reactive.

B
Nobel gases have a complete valence electron shell making them unstable and reactive.

C
Noble gases do not have a complete valence electron shell making them stable and nonreactive.

D
Noble gases have a complete valence electron shell making them stable and nonreactive.

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.