PLEASE HURRY, WILL GIVE TO CORRECT ANSWER! which of the following makes it difficult to reach and explore the outer planets?
1. the surfaces are too icy and slippery to land on.
2. they contain a lot of helium in their atmospheres.
3. massive storms with fast winds cover the surfaces.
4. none of the above.
5. both 1 and 2
6. both 2 and 3.

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in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.