Which of the following describes an element? Choose all that apply. Question 1 options:

Gold is an example.

Salt water is an example.

Different components in a fixed ration.

There is only one type of substance present.

Water is an example.

Composed of one type of atom with its own unique properties.

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.