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3 years ago

How does Rutherford’s model of the atom compare with Thomson’s model?

Chemistry

2 answers:

Eduardwww [97]3 years ago

7 0

they both describe atoms as being made up of positive and negative matter

never [62]3 years ago

6 0

Answer:

Both Thomson and Rutherford's model corroborated the presence of negative charged electrons. However, Rutherford's model suggested that the electrons are not static but they revolve around the nucleus in fixed orbits.

Explanation:

J. J. Thomson's model of an atom also called as the 'plum-pudding' model preceded that of Rutherford's model. As per the former, every atom is composed of a negatively charged electrons dispersed in a cloud of positive charge. The electrons were compared to the 'plums' spread in the positive environment of the 'pudding'.

Rutherford conducted his famous gold foil experiment, in which he bombarded positively charged alpha particles against a thin sheet of gold foil and observed their trajectory of scattering. He noticed that most of the particles passed through however, some of them bounced back. Based on the model, it was concluded that

1) Most of the space inside an atom is empty

2) The mass of an atom is primarily concentrated in the nucleus core which is positively charged.

3) Negatively charged electrons revolve around the nucleus in fixed circular paths called orbits.

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HELP.

Kamila [148]

Answer:

The mass of tin is 164 grams

Explanation:

Step 1: Data given

Specific heat heat of tin = 0.222 J/g°C

The initial temeprature of tin = 80.0 °C

Mass of water = 100.0 grams

The specific heat of water = 4.184 J/g°C

Initial temperature = 30.0 °C

The final temperature = 34.0 °C

Step 2: Calculate the mass of tin

Heat lost = heat gained

Qlost = -Qgained

Qtin = -Qwater

Q = m*c*ΔT

m(tin)*c(tin)*ΔT(tin) = -m(water)*c(water)*ΔT(water)

⇒with m(tin) = the mass of tin = TO BE DETERMINED

⇒with c(tin) = the specific heat of tin = 0.222J/g°C

⇒with ΔT(tin) = the change of temperature of tin = T2 - T1 = 34.0°C - 80.0°C = -46.0°C

⇒with m(water) = the mass of water = 100.0 grams

⇒with c(water) = the specific heat of water = 4.184 J/g°C

⇒with ΔT(water) = the change of temperature of water = T2 - T1 = 34.0° C - 30.0 °C = 4.0 °C

m(tin) * 0.222 J/g°C * -46.0 °C = -100.0g* 4.184 J/g°C * 4.0 °C

m(tin) = 163.9 grams ≈ 164 grams

The mass of tin is 164 grams

4 0

3 years ago

What’s the answer????

ivolga24 [154]

Answer:

DNA

Explanation:

6 0

3 years ago

Read 2 more answers

what is matter that can not be divided into two or more diffrent types of matter by any physical or chemical called/

VikaD [51]

Answer an atom

Explanation:

6 0

3 years ago

29. Ammonia is formed with one nitrogen and three hydrogen atoms. What is the electron configuration of nitrogen? How

masya89 [10]

Answer:

One lone-Pair is present in Ammonia

Explanation:

The number of valence electron in N = 5

The number of Valence electron in H = 1

The formula of ammonia = NH3

Total valence electron in ammonia molecule = 5 +3(1) = 5+3 = 8

The lewis structure suggest that :

Nitrogen completes its octet by sharing the electron pair with 3 hydrogen atoms.

3 electron of Nitrogen are involved in sharing with Hydrogen

So, remaining two electron are left non-bonded . Hence they exist as lone- pair

So, there is only 1 lone pair in the ammonia molecule .

The shape of NH3 is bent according to VSEPR theory . This is so because the presence of 1 lone pair causes more repulsion and occupy more space.

Thus the lone pair is changing the shape of the ammonia molecule . It also increase the dipole moment of the molecule , which gives polarity to it.

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4 years ago

Which of the following has the smallest heat capacity?

musickatia [10]

What are the options?

7 0

3 years ago

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