What does below chemistry rebus means?

There are two beautiful yet remote islands in the South Pacific. The Islanders born on one island always tell the truth, and the Islanders from the other island always lie.
You are on one of the islands and meet three Islanders. You ask the first which island they are from in the most appropriate Polynesian tongue, and he indicates that the other two Islanders are from the same island. You ask the second Islander the same question, and he also indicates that the other two Islanders are from the same island.
Can you guess what the third Islander will answer to the same question?

What do you get if you add 2 to 100 four times?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

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

What Word am I Looking For ?

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

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.