Which of the following elements is the smallest?

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

How will the emission of an alpha particle affect the atomic number of an atom

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.