You probably think on Helium.
Answer:
A. Helium
Explanation:
In chemistry, a noble gas refers to a group of elements placed in group 18, which is located in the last column from left to right in the periodic table. Additionally, these elements are defined by their low reactivity, also as gases, they do not have color or odor. Helium is part of this group that contains other 5 elements because Helium characteristics are similar to other noble gases, indeed this is the first noble gas in the periodic table. Additionally, helium is an abundant element found in all the universe especially in stars. Thus, the element that is a noble gas is Helium.
Answer:
Chlorophyll
Explanation:
Chlorophyll is the substance what gives green color for plants, also the molecule that is responsible for facilitating the process of photosynthesis.
The sun sets in the west on Earth and most of the planets in our solar system. <span>But the sun doesn't set in the west on Uranus, since Uranus's axis of rotation is tilted by about 90 degrees to the ecliptic.
Hope this helps :)
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Answer:
Una cuenca es un área de tierra que drena todos los arroyos y la lluvia a una salida común, como la salida de un embalse, la boca de una bahía o cualquier punto a lo largo del canal de un arroyo.
Explanation:
Espero que esto ayude a marcar el MÁS CEREBRAL !!!