Barium gives off a green light when it is burned. What does this tell us about the wavelengths of light it emits?

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.