Answer: Helium has the smallest radius.
Explanation: Helium has the smallest atomic radius. Due to nuclear charges and stuff ect-
I’m pretty sure it would be B
Answer:
if you want to find average speed so u need to use this formula
Average speed = 
Answer:
3
Explanation:
If oxygen reacts with iron, then both must be reactants and rust the product of that reaction
The answer is [Ne] 3s^2 3p^5 because chlorine is the fifth element in the 3rd row of elements in in p orbital