Question 1 :
If mass number is 24 and number of protons is 12, then find number of neutrons.
Question 2 :
If number of electrons in an atom is 8 and number of protons is also 8, then what is the charge on the atom?
Question 4 :
On the basis of Rutherford’s model of an atom, which subatomic particle is present in the nucleus of an atom?
Question 5 :
Chlorine occurs in nature in two isotopic forms, with masses 35 u and 37 u in the ratio of 3:1. Calculate the average atomic mass.
Question 6 :
The chemical properties of isotopes are similar but their physical properties are different. TRUE OR FALSE?
Question 9 :
If atomic number is 9 and number of neutrons is 10, then find number of protons.
Question 10 :
J.J. Thomson proposed that the nucleus of an atom contains only nucleons. TRUE OR FALSE?
Question 11 :
An isotope of iodine is used in the treatment of goitre. TRUE OR FALSE?
Question 12 :
The mass of an electron is about $\frac{1}{2000}$ times that of proton.
Question 13 :
If mass number is 2 and number of proton is 1, then find number of electrons.
Question 15 :
If mass number is 24 and number of protons is 12, then find number of electrons.
Question 17 :
If atomic number is 9 and number of neutrons is 10, then find name of the atomic species.
Question 20 :
If number of electrons in an atom is 8 and number of protons is also 8, then what is the atomic number of the atom?
Question 21 :
An isotope of _______ is used as fuel in nuclear reactor.
Question 23 :
If mass number is 1, number of neutrons is 0, number of protons is 1 and number of electrons is 1 then find name of atomic species.
Question 25 :
Which one of the following is a correct electronic configuration of sodium?
Question 26 :
If atomic number is 16, mass number is 32 and name of atomic species is Sulphur then find number of neutrons.
Question 27 :
An isotope of _______ is used in the treatment of goitre?
Question 29 :
The mass number is defined as the sum of the total number of protons and electrons present in the nucleus of an atom. TRUE OR FALSE?
Question 30 :
An isotope of iodine is used for making tincture iodine, which is used as a medicine.
