How do u know if someone likes You. And how do you tell that person you like them?

I'm not really sure

Explanation:

if someone like you they smile at u they play with u alot they stay around u alot  and jus  be your self

Explanation:

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.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.