Answer:
Dmitri Mendeleev
Explanation:
Dmitri Mendeleev published the first recognizable periodic table in 1869, developed mainly to illustrate periodic trends of the then-known elements. He also predicted some properties of unidentified elements that were expected to fill gaps within the table. Most of his forecasts proved to be correct
B. Radiant belongs to the electromagnetic force and travels through the electromagnetic field.
Top: The grasshopper population would begin to have a dramatic increase because of the lack of being eaten if the frogs disappeared and the snakes would decrease in population because of less food availability.
Bottom: All of the organisms in the food chain are equally as important because a drastic change would occur if one disruption was made.
72 percent is hydrogen. Nuclear fusion converts hydrogen into other elements. The sun is also composed of about 26 percent helium and trace amounts of other elements; oxygen, carbon, neon, nitrogen, magnesium, iron and silicon.
http://www.space.com/17170-what-is-the-sun-made-of.html