The components of poison ivy and poison oak that produce the characteristic itchy rash are catechols substituted with long-chain alkyl groups. If you were exposed to poison ivy, which of the treatments below would you apply to the affected area?

Explanation:

Although there are no actual solutions to the effects caused by poison ivy, there are still various different treatments that can help alleviate the symptoms. Sodium bicarbonate is a base that will increase pH. An increase in pH will cause the catechol to ionize. A charged substance will be more soluble in water. Soap helps with the solubility of the long alkyl chain. Another very helpful treatment would be to rub alcohol on the affected area, this can remove the  urushiol oil from the skin, helping to minimize discomfort

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6