What's the next in the series?

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

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

Can you name some countries which do not have the alphabet 'A' in them?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Which tank will fill first?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?