Answer:
4 energy levels/rings
Explanation:
By the atomic model proposed by Niels Bohr, the electrons orbit around the nucleus in shells having different energy level each with the ability to contain a given maximum amount of electrons.
The closest shell to the nucleus named the K shell, can have a maximum of two electrons, the next shell known as the L shell can have 8 electrons while the next shell, M, can have a maximum of 18 electrons
The arrangement of the periodic table is based on the number and location of electrons such that elements in the 4th row (period 4 elements) have three completed energy levels/rings before, their valence ring making the total number of rings = 4 energy levels/rings.
Answer:
I think the answer would be the arrangment of the mineral's atoms.
Explanation:
that is how it gets physical and chemical properties.
Answer:
The maximum mass of sodium sulfide that could be produced is 35.26 grams.
Explanation:
Moles of sodium sulfate =
Moles of carbon =
According to reaction, 1 mole of sodium sulfate reacts with 4 moles of carbon.
Then 0.6514 moles of sodium sulfate will react with:
of carbon.
2.6056 moles of carbon > 1.8083 mol of carbon (given)
As we can see that moles of sodium sulfate are in excess ,so, the amount of sodium sulfide will depend upon moles of carbon.
According to reaction, 4 mole of carbon gives with 1 moles of sodium sulfide.
Then 1.8083 moles of carbon will give :
of sodium sulfide.
Mass of 0.4521 moles of sodium sulfide:
0.4521 mol × 78 g/mol = 35.26 g
The maximum mass of sodium sulfide that could be produced is 35.26 grams.
The answer should be B, it reacts in air to form a green layer.
Chemical properties means that how the substance that reacts with other substance to produce new substances. Usually it cannot be measured or observed just with the substance itself.
From all the options above, only B is a reaction. The green layer formed is a new substance produced by copper and air. It involves a chemical change.
Other options like boiling points or state of matter, these are physical properties. They do not require it to react to other substances and the can be measured and observed easily.