Which of the following is a correct description of an atom? A. A very small particle that holds a positive or negative charge depending upon the element
B. A mixture of protons and electrons surrounded by neutrons in very tight orbits
C. A very small particle that's the same for every element
D. The smallest particle of an element that still keeps the properties of that element

compass can be used day and night, cloudy or sunny

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.