atomic structure, Chemistry

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what is the mass of a proton and electron

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Penny Lab, Pennies made after 1982 are made of 97.5% zinc and 2.5% copper i...

Pennies made after 1982 are made of 97.5% zinc and 2.5% copper instead of 95% copper and 5% zinc. Pree 1982 pennies weighed 3.10g. The penny contained 2.95g of zinc and 0.15g of co

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The spectrum of  He is expected to be similar to: (1) H                      (2) Li +        (3) Na                 (4) He + Ans:  Li +

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Quantitative elemental analysis: The instrument used for AFS consists of atom reservoir that might be a flame or a furnace etc., a basic source emitting the features absorptio

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Electrophilic Addition Reactions (A) Such types of reactions are generally provided by alkynes and alkenes. (B) Electrophilic addition reactions of alkynes and alkenes are m

Show that water pressure increases with depth, Another way to show that wat...

Another way to show that water pressure increases with depth Search a tall tin can. Punch holes up the side of the can about 3 cm apart. Put a strip of adhesive or plastic tape

Explain in detail about the allotropy, Explain in detail about the Allotrop...

Explain in detail about the Allotropy Allotropy refers only to dissimilar forms of an element within the similar phase or state of matter (i.e. different solid, liquid or gas

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Ammonia is oxidised with air to form nitric oxide in the first step to produce nitric acid.  The reaction occurs in a well insulated continuous reactor based on the stoichiometry:

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Q. What are the Physical Properties of Halogens? Ans. The halogens exist as  diatomic  molecules held together by a single bond. Reactivity becomes less as you move down

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Time-of-entry experiments indicate that a gene for resistance to kanamycin, kan-r, is closely linked to a gene for resistance to bacteriophage T5, T5-r. A geneticist has strains of

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