Given the diagrams X, Y, and Z below:
Key
Atom of element A=0
Atom of element B=0
Which diagram or diagrams represent a mixture of
elements A and B?

Identify which properties could correspond to solids, plasmas, or both. maintain a unique shape. collide infrequently with other particles. have very high velocities. conduct electricity. protons. have a low temperature. has long-range order.

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products

What items could scientists use to date a layer of rock