Một nguyên tử của một nguyên tố có tổng số hạt là 13. Vậy nguyên tử đó có số proton là ?

so she was walking and she stepped on warm jeffy , uh uh uhh dadye i just pooped my pants

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.

5.6⋅10−^19  j

do you need the explaination?