When separating a mixture by normal phase chromatography (column or thin-layer), why is better to change from less polar solvent to a more polar solvent rather than the opposite

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

What element has similar physical and chemical properties as boron.

Did you mention that adding weight increased the pressure