Choose the correct abbreviation of potassium (k) written in its noble gas configuration [ar]4s1 [ar]3p64s1 [ar]3p6 [kr]5s1

[Ar]4s1

Explanation: Potassium is an element with atomic number 19, thus it contains 19 electrons. It is  a metal which readily loses its electrons to acquire stable configuration of Argon which has 18 electrons with completely filled subshells.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.