How many electrons are in the valence shell a. three
b. one
c. five to eight
d. four
e. two

Explanation:

Here, there's 4 electrons in the valence shell.

Electronic configuration =

1s² 2s² 2p⁶ 3s² 3p²

Therefore,

Option D is correct✔

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .

the ratio of the conjugate base to the acid required to attain the desired ph.