J. J. Thomson worked in the field of chemistry and proposed the atomic model theory after the discovery of the electron. He proposed the plum pudding model. Thus, option A is correct.
The plum pudding model of the atom was proposed by J.J. Thomson, after the discovery of electrons. The “plum pudding” atomic model was based on the plum cake structure where the sub-atomic particles were placed.
According to the model, the electrons being negative species were embedded as the cherries in the structure, while the protons being positive in charge were freely present in the rest of the pudding.
Therefore, Thomson proposed the “plum-pudding” atomic model.
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Answer:
the plum pudding model
Explanation:
A. AgCrO4(s) + Na2NO3(aq)
B. Ag2CrO4(s) + NaNO3(aq)
C. Ag(CrO4)2(s) + Na2NO3(aq)
D. Ag(CrO4)3(s) + Na(NO3)2(aq)
The products obtained when 2 AgNO₃ + Na₂CrO₄ reacts is Ag₂CrO₄ + 2 NaNO₃.
The reaction in which reduction and oxidation takes place simultaneously
by obtaining or losing an electron, the oxidation number of a molecule, atom, or ion varies.
In the question it is given that
AgNO₃(aq) + Na₂CrO₄(aq) → and we have to predict the products
So Silver Nitrate when reacts with Chromic Acid to from silver Chromate and sodium nitrate.
2 AgNO₃ + Na₂CrO₄ → Ag₂CrO₄ + 2 NaNO₃
Therefore Product B is the correct answer.
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Answer: and
Explanation: Potassium is a first group metal with one valence electron and so it has +1 charge. Sulfate ion is a polyatomic ion with -2 charge. The compound potassium sulfate has two potassium ions and one sulfate ion and the below equation shows how the ions are written when the compound is dissociated into its ions.
27.37%
38.09%
57.13%
Na- 11=22
H-1 =1
C-12=12
O3=16*3 =48
total = 22+1+12+48 = 83
83-----> 48
100-----> 100*48/83=57.83 = 57.13 is nearest answer
endothermic, causing an increase in the kinetic energy of the water molecules.
(exothermic, causing an increase in the kinetic energy of the water molecules.)
exothermic, causing an increase in the kinetic energy of the solute particles.
The reaction is exothermic, causing an increase in the kinetic energy of the water molecules.
• In a calorimeter when the reaction takes place, and there is an increase in temperature recorded in the thermometer, it shows that the reaction is emitting heat to the surrounding, and such kind of reactions is known as exothermic reaction.
• With the mixing of aqueous solution of HCl and NaOH the temperature of the solution increases, this shows that the kinetic energy of the water molecules increases. As, kinetic energy is directly proportional to the temperature.
• With increase in temperature, the collision or vibration of molecules increases, thus, there is an increase in the kinetic energy between the molecules.
Thus, the reaction is exothermic, causing an increase in the kinetic energy of the water molecules.
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