Question 5
write the following metals using roman
numeral notation. then, explain why the
roman numeral differs for these metals.
• co2+
fe, o
answer in complete sentences.

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 think it is true since you can test the answer and can use observations to complete it.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.