What does below chemistry rebus means?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

Fate has decided that you will only be pleased to meet me when you need me

Maybe that is why, when I am working, I start working

However annoying I may be to the regulars, the little ones are always inspired

I will always be waiting if you try to reach me

How many of you can guess my name, let me see

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Which number comes next in the number series?

2, 9, 30, 93, ?