What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

What does it mean?

There is something which you can be arrested for attempting but not for successfully completing.

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

On a special event at the prison, 5 prisoners John, Jacob, Krist, Tang, and Dang given a chance to go to a sauna and can bring one thing with them.

Following are the things that the prisoners bring with them.
John: A soda
Jacob: Thermos
Krist: Book named "How to kill"
Tang: A Walkman
Dang: Harmonica

Since it is a Sauna, no one can see each other. After a while When the steam is switched, Tang was found dead and there was blood all around.
J Bond was called and he instantly come to know who can be the murderer. How?

During which month do people sleep the least?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?