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balu736 [363]
3 years ago
6

Rutherford bombarded gold foil with alpha (a) particles and found that a small percentage of the particles were deflected. Which

of the following was not accounted for by the model he proposed for the structure of atoms?
A. the presence of electrons on shells outside the nucleus
B. the presence of neutrons
Chemistry
1 answer:
Alex73 [517]3 years ago
8 0

Answer:

The presence of neutrons

Explanation:

Based on gold foil experiments, Rutherford proposed a atomic model known as Rutherford'd model or nuclear model or planetary model of the atom.

As per this model, most of the mass of the atom is concentrated in the center of the atom known as nucleus.

Electrons revolve around it same as planet revolve around sun.

Since, neutrons had not been discovered at the time of Rutherford'd model, therefore, as per the Rutherford'd model, nucleus is only made of protons.

Therefore, the correct option is option B

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What volume of argon gas is equal to 1.60 grams of argon
Novosadov [1.4K]

Answer:

0.908 L.

Explanation:

  • Firstly, we should calculate the number of moles of 1.60 g argon.
  • n of Ar = mass / molar mass of Ar = (1.60 g) / (39.948 g/mol) = 0.04 mol.
  • |t is established  and known that the molar volume of a gas at STP (Standard Temperature and Pressure) is equal to 22.4 L for 1 mole of any ideal gas at a temperature of 273.15 K and a pressure of 1.00 atm.

<u><em>using cross multiplication:</em></u>

1.0 mole of Ar gas will occupy → 22.7 L

0.04 mole of Ar gas will occupy → ??? L

∴ The volume  occupied by Ar = (0.04 mole) (22.7 L) / (1.0 mole) = 0.908 L.


6 0
3 years ago
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What was concluded about the structure of the atom as the result of the gold foil experiment? 1)a positively charged nucleus is
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It's 2) a positively-charged nucleus is surrounded by mostly empty space (aka Rutherford's Model). 

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What is an Alkanoate?​
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