Which of the following inert gases is placed in period 4 of the periodic table?
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The Chemical formula of Ammonium nitrate is ___________.
What is the number of groups and periods in the modern periodic table?
The melting point of ice is ____ K.
Process of loosing electrons is known as _____.
Which of the following gas leaked in the Bhopal Gas tragedy in December 1984?
A radio-active substance has a half life of six months. Three-fourth of the substance will decay in ______.
Alpha particles are ___________.
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