In the event that you are exposed to infectious materials by being accidentally stuck with a used needle, you should report it to your supervisor and seek medical attention. however, what is the one thing you should do first? a. bandage the wound b. wash with soap and water c. there is nothing else that can be done d. use a tourniquet

You should definitely wash it with soap and water first!

a graduated cylinder.

explanation:

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