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Q. The atomic number is the number of
Explore Relevant Multiple Choice Questions (MCQs)
Q. The sum of protons and neutrons in an atom gives off
Q. The elements which have the same number of protons but different number of neutrons are called
Q. The proton number is denoted by the symbol
Q. Particular element posses the same number of electrons hence have the same
Q. The number of atoms in the same element has the same number of
Q. Hydrogen has a number of isotopes
Q. Specific radioactive isotopes are used for
Q. The mass number is the
Q. The atom of aluminum (Al) has the number of neutrons (n⁰)
Q. Down the group the electrical conductivity
Q. The number of proton, neutron and electron in sulfide ion is respectively
Q. The number of electrons (e⁻) are always equal to number of protons(p⁺) in a
Q. The atoms of element convert into ions upon being
Q. Relative atomic mass for chlorine is
Q. The mole of a substance is the relative atomic mass or relative molecular mass in terms of
Q. The instrument which is used to find relative atomic mass of each isotope in an element is called
Q. The second principal quantum shell can accommodate the number of electrons in numbers
Q. The electrons (e⁻) of the quantum shells, which are further away from nucleus retain attraction, which is
Q. The region outside nucleus where electrons (e⁻) revolve is called
Q. The presence of electrons is shown by three-dimensional shape of orbit with
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