This is the state of a solution when dissolving rate = re-crystallization rate. O Immiscible
O Soluble
O Equilibrium
O Miscible

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

i belive it is water

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.