What does below chemistry rebus means?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

Solve this riddle by finding the odd one out from the rest.

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?