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13/05/2026
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01/01/2023
Happy New Year!
We wish you a wonderful new year and hope it brings you many blessings.
Get rid of the old to make place for the new, and we wish you happiness throughout the year! Best wishes for the New Year!
25/12/2022
May πΊππππ πͺπππππ bring you everything you wished forπππ.
23/12/2022
23/12/2022
β’ PROBLEM OF THE DAY. π€
a. What is a mass spectrum?
b. Chlorine has two isotopes. The isotopic mass and percentage abundance of the heavier isotope are 36.98 and 24.95% respectively.
i) Calculate the isotopic mass of the lighter isotope;
ii) Sketch the mass spectrum of chlorine element.
[Ar(Cl ) = 35.5 ]
Which of the following units is not a S. I units?
A. metre
B. kilogram
C. yard
D. seconds.
The two(2) types of bonds in ammonium chloride, NH4Cl are
A. Covalent and Ionic
B. Metallic and Ionic
C. Polar covalent and Ionic
D. Coordinate and covalent.
Noble gases are......
A. diatomic
B. triatomic
C. polyatomic
D. monoatomic.