Question 1 :
If atomic number is 16, mass number is 32 and name of atomic species is Sulphur then find number of electrons.
Question 2 :
Dalton’s atomic theory suggested that the atom was divisible and destructible. TRUE or FALSE ?
Question 5 :
On the basis of Rutherford’s model of an atom, which subatomic particle is present in the nucleus of an atom?
Question 6 :
It was observed that the atoms of elements, completely filled with 8 electrons in the outermost shell show little chemical activity. TRUE OR FALSE?
Question 7 :
If atomic number is 9 and number of neutrons is 10, then find number of electrons.
Question 8 :
An isotope of _______ is used as fuel in nuclear reactor.
Question 9 :
The mass of an electron is about $\frac{1}{2000}$ times that of proton.
Question 10 :
An isotope of _______ is used in the treatment of goitre?
Question 11 :
An atom is divisible and consists of charged particles. TRUE OR FALSE?
Question 12 :
Atoms of the same element, having the same atomic number but different mass numbers are called?
Question 13 :
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 14 :
If mass number is 24 and number of protons is 12, then find atomic number.
Question 15 :
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 16 :
If mass number is 2 and number of proton is 1, then find number of electrons.
Question 17 :
Atoms of different elements with different atomic numbers, which have the same mass number, are known as?
Question 18 :
J.J. Thomson proposed that the nucleus of an atom contains only nucleons. TRUE OR FALSE?
Question 19 :
Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?
Question 20 :
According to Rutherford, Radius of the nucleus is about ____ times less than the radius of the atom.
Question 21 :
If atomic number is 16, mass number is 32 and name of atomic species is Sulphur then find number of neutrons.
Question 22 :
An isotope of iodine is used for making tincture iodine, which is used as a medicine.
Question 24 :
If atomic number is 9 and number of neutrons is 10, then find name of the atomic species.
Question 26 :
If mass number is 2 and number of proton is 1, then find atomic number.
Question 27 :
An isotope of cobalt is used in the treatment of cancer.TRUE OR FALSE?
Question 28 :
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?