Helium, Neon, and Xenon are all part of the same column on the Periodic Table. Such a column is referred to as a Group, because they have the same number of valence electrons in their outermost shell. Hope this helps!
its the first one. A.
Answer:
d
Explanation:
because is a reducing agent, O 2 is an oxidizing agent.
Answer to the question is: 1837.65 millimeters of mercury are equal to 245 kPa.
1 kPa are equal to 7.50062 millimeters of mercury.
