Which fundamental principle from chemistry states different samples of the same substance contain elements in the same proportions?

2. you__turn left on a red light if you are in the left-most lane of a one-way street, you're turning into the left-most lane of a one-way street, and no nearby sign prohibits the turn.

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted

Particles vibrate in a rigid structure and do not move relative to their neighbors.