Hi there!
Neon (Ne) -- Atom. This is one, singular atom of neon. It is not connected to anything else.
Carbon Dioxide (CO₂) -- Compound. This is a molecule containing <u>at least</u> two different elements (Carbon and Oxygen)
Water (H₂O) -- Compound. See reason above. There are two different types of atoms in this molecule.
Hydrogen gas (H₂) -- Molecule. The reason that this is different, is because the whole structure is one type of element (Hydrogen).
As for the element option. The word "element" is used to define an atom with properties relating to another one. A Silicon atom, will react just like another Silicon atom.
Hope this helps!
Brady
Answer:
c. liquid
Explanation:
because the are not very close if the said very closely packed together it would have been a solid
I think the best answer is C. Since the light energy would be the sun and chemical energy being the glucose that feeds the plant.
Then we would not have oxygen because plants give oxygen in order to breathe
High density is the most likely answer