Electron structure of sodium:
₁₁Na: 1s²2s²2p⁶3s¹
Answer:
A. Both describe ways a solid can change.
Answer: The compound in medicines should be non polar.
It is important for any drug to be able to dissolve itself through the cell membrane which consists of a lipid bi-layer, in order to diffuse in the body and circulate biologically, performing its function.
Non polar compounds are lipid soluble and therefore can dissolve in the lipid layers.
Polar compounds are water soluble and fail to cross the cell membrane.
Therefore scientists need to be sure of using compounds that are non polar in nature so they pass through the cell membrane and enter into the blood circulation of the body and perform its due function.
Explanation:
B. The surface of a silver cup turns black when it is exposed to air.
The answer I think it’s C I think.
