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kakasveta [241]
3 years ago
9

What was one important discovery that the curies made?

Chemistry
1 answer:
Alika [10]3 years ago
3 0
There were 2 notable Curies in history, Marie and Pierre. They were actually married couple. They both discovered Polonium and Radium from pitchblende). These elements were radioactive hence the discovery of radioactivity. R Their main discovery is how they could isolate the radioactive material. She also further developed the X-ray. 
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Why is the reaction SO2 + H2O → H2SO2 not balanced?
aalyn [17]

There are more oxygen atoms in the reactants while there are less oxygen atoms in the product.

Both sides of the equation is supposed to be balanced for a balanced equation. If any one of them isn't balanced, the equation remains unbalanced.

The main reason why the reaction above can not be balanced is:

This chemical reaction SO2 + H2O -> H2SO2 is not correctly written.

It must be: SO2 + H2O -> H2SO3

<em>hope this helps....</em>

5 0
3 years ago
A neutral atom in its ground state contains 28 electrons. this element is considered a ________ element, and has _______ electro
zalisa [80]
A neutral atom in its ground state contains 28 electrons. this element is considered a <span>transition </span>element, and has 8 electrons in orbitals with l = 2.
Electron configuration: ₂₈X 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁸ 4s².
l is azimuthal quantum number, l = 2 describes d orbital. There is eight electrons in 3d orbital.
4 0
4 years ago
Read 2 more answers
What is significant about the temperature absolute zero?
Reptile [31]

Explanation:

The absolute temperature is the lowest possible temperature in the universe. At this temperature, all atoms become motionless and cease to move.

The value of the absolute zero is pegged at -273.16°C.

  • It is the lowest limit of the coldness of a body.
  • Nothing can be colder than a body at absolute temperature.
  • Many researches are underway to take advantage of this temperature value for scientific purpose.
  • Thermodynamically, all process stops at this temperature.
  • When a body is brought close a body at absolute zero, it can suffer cryogenic burn due to heat transfer.
4 0
3 years ago
PLEASE HELP ME!!!!!!!! Explain why understanding the process of combustion requires using an atomic model of mass and not a cont
Rom4ik [11]

Answer:

Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel.

There must be Fuel to burn.

There must be Air to supply oxygen.

There must be Heat (ignition temperature) to start and continue the combustion process.

6 0
4 years ago
A flexible container at an initial volume of 5.120 L contains 8.500 mol of gas.
SOVA2 [1]

Answer:

30.05 mol

Explanation:

solving the proportion

V1 / n1 = V2 / n2

5.120 L            18.10 L

–––––––– = ––––––

8.500 mol         x

x = 30.05 mol

6 0
3 years ago
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