If the substance mixes with water it's polar. If it doesn't it ms non polar.
2h-7 I had that before unless I’m tripping but I did rechecked
Make small talk and become his friend get to know him if he opens up he trust you and then you take it from there.
Answer:
number of energy levels
Explanation:
for example hydrogen and helium are in period 1 and they have 1 energy level
