The last one. A mixture isn’t chemically combined.
An ionic bond is formed between lithium and bromine.
Answer:
If it is pure, the substance is either an element or a compound. If a substance can be separated into its elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture. If its composition is uniform throughout, it is a homogeneous mixture.
you've just posted only 1 question and the answer for that is option C.
thanks!
The best definition of low electromagnetic energy would be A. Low electromagnetic energy has long wavelengths and low frequency.
