Which statements belong to Dalton’s atomic theory? Select four options.

Atoms have a massive, positively charged center.
Atoms cannot be created or destroyed.
Atoms cannot be broken down into smaller pieces.
All atoms of an element are identical.
Chemical reactions cause atoms to be rearranged.
Electrons are located in energy levels outside of the nucleus.

1. Atoms cannot be created or destroyed.

2. Atoms cannot be broken down into smaller pieces.

3. All atoms of an element are identical.

4. Chemical reactions cause atoms to be rearranged.

Explanation:

answer; i believe that the best answer is (secondary cardiac arrest due to

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.