-In some cities, a pollution check has been made compulsory for vehicles. And mske a report about the process of conducting a pollution check. You may systematically record your findings in the following areas: )Average number of vehicles checked per month. )Time taken to check each vehicle. i) Pollutants checked for. iv) The process of testing. v) Permissible levels of emission of various gases. vi)Measures taken if the emitted gases are above the permissible limits. vii) How frequently is a pollution check required ? pls answer in detail

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