Match the three phases of matter. 1.
fixed volume; variable shape
Fas
2. fixed volume, fixed shape
solid
3. variable volume; variable shape
liquid

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

2b2t

explanation:

2b2t