Some students were investigating the speed of a toy car. they perform two trials and recorded their data in the table below what was the average speed of the toy car during the two trials to the nearest tenth of a m/s? be sure to use correct place values.

25.4
1.6
3.0
6.4​

It's 3.0

Hope this helps :)

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

they are all solids.