Structure of the Atom — Science STD 9 — Question

State whether the following statement is true or false:

Milk is a pure substance.

For the following statements, write T for True and F for False.
J.J. Thomson proposed that the nucleus of an atom contains only nucleons.

State whether the following statements are true or false:
Thomson proposed that the nucleus of an atom contains protons and neutrons.

State whether the following statement is true or false:
Solid carbon dioxide is stored under low pressure.

State whether the following statement is true or false:
Radioactive isotope of iodine is used for making the medicine called tincture iodine.

State whether the following statements are true or false:
A chloride ion has negative charge because it has more electrons than a neutral atom.

State whether the following statements are true or false:
The cathode rays obtained from all the gases consist of negatively charged particles called electrons.

State whether the following statements are true or false:
A sodium ion has positive charge because it has more protons than a neutral atom.

Most part of the atom is hollow.

State whether the following statements are true or false:
Thomson proposed that the nucleus of an atom contains protons and neutrons.