Describe two major shortcomings of Bohr's model of the atom.

Chemistry

1 answer:

umka2103 [35]3 years ago

8 0

Answer:

Describe two major shortcomings of Bohr's model of the atom. Bohr's model was valid only for a single electron atom, and it did not explain the chemical nature of atoms. ... The number used to specify the main energy level of atom; symbolized by n.

Explanation:

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Out of magnesium and Calcium which element is more reactive give reason

SIZIF [17.4K]

Answer:

Calcium is more reactive.

Explanation:

It is higher in the reactivity series, and contains more energy levels.

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3 years ago

Lead(II) nitrate is added slowly to a solution that is 0.0800 M in Cl− ions. Calculate the concentration of Pb2+ ions (in mol /

barxatty [35]

Answer:

$[Pb^{2+}]=3.9 \times 10^{-2}M$

this is the concentration required to initiate precipitation

Explanation:

$PbCl_2$ ⇄ $Pb^{2+}+2Cl^-$

Precipitation starts when ionic product is greater than solubility product.

Ip>Ksp

Precipitation starts only when solution is supersaturated because solution become supersaturated then it does not stay in this form and precipitation starts itself only solution become saturated.

This usually happens when two solutions containing separate sources of cation and anion are mixed together and here also we are mixing lead (||)nitrate solution(source of lead(||)) into the Cl- solution.

$Ip=[Pb^{2}][2Cl^-]^2=Ksp$