Question

1. Chadwick discovered the electron.
2. A proton is 1/1837 times heavier than an
electron.
3. The electrons in the outermost orbit of an
atom are called bound electrons.
4. The mass of neutron is equal to the
hydrogen atom and it is positively charged.
5. The core of an atom is called its centre.​

Answer 1

Answer:

2 option is correct Exactly

Answer 2

As all the statements are incorrect, following are the correct statements:

1. Chadwick discovered the neutron.

2. A proton is 1837 times heavier than an  electron.

3. The electrons in the outermost orbit of an  atom are called valence electrons.

4. The mass of neutron is equal to the  hydrogen atom and it is neutral.

5. The core of an atom is called its nucleus.​