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1 year ago

Which hypothesis of thomson's atomic model was later found to be not true by niels bohr and why?

1 answer:

3 0

The hypothesis of Thomson's atomic model was that an atom is posively charged sphere and in which negatively charged electron are embedded in it but later it was found to be not true by niels Bohr.

The above hypothesis of Thomson's atomic model was false because according to niels Bohr 'The mass of any atoms is localize at the center of an atom which is positively charged while negatively charged electrons revolved around the positive charged'.

The J.J Thomson give the world Thomson model of the atom in 1904 . Thomson model is also known as the plum pudding model .

To learn more about Thomson's atomic model

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Are elecronegativity values higher for metals than nonmetals.

Leya [2.2K]

Non-metals, which are organized on the right side of the periodic table, have higher electronegativity values than the metals.

Hope this helped!

3 0

3 years ago

A lead–tin alloy of composition 30 wt% Sn–70 wt% Pb is slowly heated from a temperature of 150°C (300°F).(a) At what temperature

Novay_Z [31]

Answer:

a) 231.9 °C

b) 100% Sn

c) 327.5 °C

d) 100% Pb

Explanation:

This is a mixture of two solids with different fusion point:

$Tf_{Pb}=327.5 C$

$Tf_{Sn}=231.9 C$

<u>Given that Sn has a lower fusion temperature it will start to melt first at that temperature. </u>

So the first liquid phase forms at 231.9 °C and because Pb starts melting at a higher temperature, that phase's composition will be 100% Sn.

The mixture will be completely melted when you are a the higher melting temperature of all components (in this case Pb), so it will all in liquid phase at 327.5 °C.

At that temperature all Sn was already in liquid state and, therefore, the last solid's composition will be 100% Pb.

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3 years ago

Which of the following questions is outside the scope of science?

Airida [17]

A. How religion and philosophy different
All the other choices (b-d) can be explained by science while a can be explain by history I think

4 0

3 years ago

True or false. Large covalent molecules with the same molecular formula or more likely to have identical angles between orbitals

Alexeev081 [22]

True, because the large covalent molecules would combine with the others

6 0

3 years ago

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olga2289 [7]

Answer:

kkkwkisa

Explanation:

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3 years ago