Moving from the element with atomic number 10 to atomic number 11 on the periodic table, there is a change in reactivity. In three to five sentences, identify the direction of the change and give two reasons for the change.

Like many other animals, sheep travel in herds.  The tendency is for each individual sheep to stay with the herd. However, a sheep may sometimes wander off, depending on how strong the attraction is for a particular food or water supply.  At other times, a sheep may become frightened and run off.  Whether a sheep chooses to stay with the herd or go its own way depends on the balance between attraction to the herd and attraction to the outside influence.

There is an on-going tension between the electrons and protons in an atom.  Reactivity of the atom depends in part on how easily the electrons can be removed from the atom.  We can measure this quantity and use it to make predictions about the behaviors of atoms.  i looked it up hope this is it

Explanation:

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length