Put tick (✓) against correct choice and cross (×) against wrong choice in following question.
Isotopes of an element have
(a) the same physical properties
(b) different chemical properties
(c) different number of neutrons
(d) different atomic numbers
For the following statement, write T for ‘True’ and F for ‘False’.
An isotope of iodine is used for making tincture iodine, which is used as a medicine.
Fill in the blanks of the following statement :
An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of the atom is ___________.