11.You and a friend find a rusty wire coat hanger near the beach. The wire has a much larger diameter than the wire in a new coat
hanger. Your friend says the wider wire disproves the Law of Conservation of
Mass. Explain why he is wrong?

because he would've not known properly about it!

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