Describe Think of a train traveling along a winding track. Give an example of a
change in the train's speed, a change in
the train's velocity, and a change in the
train's acceleration. TEKS 8.6(B) supporting

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

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements