Which of the following elements is likely to form a ionic bond with potassium a. ci b. au c. li d. ca

 The element  that  is  likely  to form a ionic  bond  with potassium is  Cl  (answer A)

Explanation

Ionic   bond  -  is a  bond formed  when  a  metal  and  a  non metal react.

Metal loses  electron ( donate  electrons)  while  non metal   gains  electrons  ( accept  electrons)  to form  ionic  bond.

potassium  is a metal  while Chlorine(Cl)  is a non  metal.  They  react  to form an ionic  bond   by potassium  donating  1 electron  while  chlorine accept 1 electron.

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

answer: 4

explanation: 8