In known elements, the maximum number is of
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A radioactive substance has a half life of four months, three-fourth of the substance would decay in
The isotopes of chlorine with mass number 35 and 37 exist in the ratio of
An atom can achieve octet by ______.
I. sharing electron
II. gaining electron
III. losing electron
The mass of one molecule of oxygen is
Which one of the following elements is the poorest conductor of heat
What enables an electric current to flow in a circuit?
Milk of Magnesia is used as a
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