The ability to summarize information is a vital component to understanding the information you read in your coursework. To summarize information:
• create a brief statement that explains the meaning of something much longer;
• decide what points are crucial to the main idea;
• put the information into your own words, i. e., how would you say it if you were the author?
OBJECTIVES

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

Neither model is able to show the reactivity of potassium.