Which of the following statements about hearing protection are true? a. all of the statements are true b. earplugs and earmuffs are the most common types of hearing protection devices c. long exposure to high levels of noise can damage your hearing d. osha requires your employer to provide you with hearing protection when you are exposed to loud noises for an extended period of time

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

so what is the problem with your lab report and whats the subject of the lab report? i will you