The summary of Dalton's atomic theory is listed below
1. All matter are made up of small indivisible substances called atoms (same as option 2)
2. Atoms of the same elements are alike in all aspect and are different from atoms of other elements (same as options 1 and 4)
3. Atoms combine in simple whole number ratio to form compounds
4. atoms can neither be created nor destroyed but it is the smallest unit of matter that can take part in a chemical reaction (this is contrary to option3)
From the above, it can be deduced that "atoms change into other atoms in chemical reactions" is not part of Dalton's atomic theory.
I can tell you're not very educated because everyone knows that breathing pure oxygen for long periods of time can sometimes hurt us. Oxygen in lower levels, such as levels found in atmosphere are just right for us to breathe. Get a life and stop trying to scare young kids that just want help on their homework.
Before the bullet is fired the momentum is Zero because nothing is moving but once the bullet is shot the momentum increases because of the movement of the bullet moving forward.
