Because each element has an exactly defined line emission spectrum, scientists are able to identify them by the color of flame they produce.
Answer:
1. During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will continue to move across the membrane in both directions.
Hopes it Helps!
B
A definite chemical composition means that all occurrences of that mineral have a chemical composition that varies within a specific limited range and the atoms that make up the mineral must occur in specific ratios.
