What's the next in the series?

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

I look at you, you look at me I raise my right, you raise your left. What am I?

The more of this there is, the less you see. What is it?

Which country gets ill every time?

A guard is positioned at the one side of the bridge saying ‘A’. His task is to shoot all those who try to leave from ‘A’ to the other side and say ‘B’. He also need to welcome the person who comes from another side ‘B’ to his side ‘A’. The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave. You are at side ‘A’ and wish to go to another side ‘B’. you also know that it would take 1:45 hr to cross the bridge. How will you cross the bridge?

This was asked in an interview with Coa-Cola.

The interviewer has given me 100 marbles(50 white and 50 black) and two empty boxes.
He then told me that he will leave the room and i need to place all the marbles in two boxes.

And When he come back, he will draw a marble from any of the two box and if the marble is white I will be hired.

Also
* No box can be empty.
* All 100 marbles must be placed in one of the two boxes.

So what should I have done?

What has a bottom at the top?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What is the word or phrase?