Question 1 :
If an atom contains one electron and one proton, will it carry any charge?
Question 3 :
If atomic number is 16, mass number is 32 and name of atomic species is Sulphur then find number of protons.
Question 5 :
If Bromine atom is available in the form of, say, two isotopes $^{79}_{35}Br$ (49.7%) and $^{81}_{35}Br$ (50.3%), calculate the average atomic mass of bromine atom.
Question 6 :
Dalton’s atomic theory suggested that the atom was divisible and destructible. TRUE or FALSE ?
Question 8 :
If mass number is 2 and number of proton is 1, then find number of neutrons.
Question 9 :
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 10 :
If mass number is 2 and number of proton is 1, then find name of the atomic species.
Question 12 :
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 15 :
The mass of an atom of any natural element is taken as the average mass of all the naturally occuring atoms of that element. TRUE OR FALSE?
Question 16 :
If atomic number is 16, mass number is 32 and name of atomic species is Sulphur then find number of neutrons.
Question 17 :
An isotope of cobalt is used in the treatment of cancer.TRUE OR FALSE?
Question 18 :
If mass number is 2 and number of proton is 1, then find atomic number.
Question 19 :
Atoms tend to achieve an octet in the outermost shell by sharing, gaining or losing electrons. TRUE OR FALSE?
Question 20 :
Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?
Question 21 :
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With the help of the above table, find out the mass number of oxygen and sulphur atom.
Question 22 :
An isotope of _______ is used as fuel in nuclear reactor.
Question 25 :
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?