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Shalnov [3]
3 years ago
10

What did Thomson’s model of the atom include that Dalton’s model did not have?

Chemistry
2 answers:
Allushta [10]3 years ago
6 0
Thomson's model included Protons and Electrons. His model is referred to as 'Plum Pudding' because of it.
Minchanka [31]3 years ago
5 0

Answer: subatomic particles: negative charges (electrons) distributed in a mass of positive charge.

Explanation:

1) John Dalton's model depicted the matter as the combination of tiny, indivisible particles, called atoms.

According to this model, atoms can not be created, destroyed, or divided into smaller particles.

2) When it was discovered that all forms of matter contained negative particles, by multiple experiments with cathode ray tubes, those particles where named electrons.

3) J.J. Thompson could determine that the mass of those negative charges was much smaller that the mass of the smallest atom (hydrogen). Concluding that existed smaller particles than the atom. Hence, Dalton's model was wrong: atoms was divisible into smaller subatomic particles.

4) Then J.J Thompson proposed the plum pudding model, in which the electrons (plums) are embeded into a uniform positive mass (pudding).

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A 250. ML sample of 0.3M HCl is partially neutralized by the addition of 100. ML of 0.25M NaOH.Find the concentration of hydroch
GuDViN [60]

Answer:- 0.143 M

Solution:- HCl and NaOH reacts in 1:1 mol ratio as shown in the below reaction:

HCl(aq)+NaOH(aq)\rightleftharpoons NaCl(aq)+H_2O(l)

Let's calculate the initial moles of HCl and the moles of NaOH added to it:

250.mL(\frac{1L}{1000mL})(\frac{0.3molHCl}{1L})

= 0.075 mol HCl

100.mL(\frac{1L}{1000mL})(\frac{0.25molNaOH}{1L})

= 0.025 mol NaOH

Since they react in 1:1 mol ratio, 0.025 mol of NaOH will react with 0.025 moles of HCl.

Remaining moles of HCl = 0.075 - 0.025 = 0.050

Total volume of the solution = 0.250 L + 0.100 L = 0.350 L

So, the concentration of HCl in the resulting solution = \frac{0.050mol}{0.350L}

= 0.143 M

Hence, the concentration of HCl acid in the resulting solution is 0.143 M.

5 0
3 years ago
Which acid is stronger: HBrO2 or HBrO3 ?
nignag [31]

Answer:

The stronger acid is HBrO3.

Explanation:

It has an additional oxygen making it more electronegative, in turn making it a stronger acid.

8 0
3 years ago
36. What is the formula of pentaphosphorus decoxide?<br> A)P5010<br> B)PO 10<br> C)PO<br> D)P10 05
rosijanka [135]

Answer:

A)P5010

Explanation:

Penta- means 5 and deca/deco- means 10

3 0
3 years ago
What is the reason for heat transfer from one substance to another?
Yuliya22 [10]
Hey man its difference in temperature
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Quiz
olga2289 [7]

What does matter mean?

Object which has mass and occupies space

What does atom mean?

The smallest particle of a chemical element which is made mainly by 3 sub-atomic particles called Protons,Electrons and Neutrons.

What does molecule mean?

A small group of atoms bonded together.

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