PLEASE. ANSWER ASAP Which of the following statements is true about energy quantization at the atomic level?

Electrons in all the orbits around the nucleus have the same amount of energy.

Electrons absorb or release the same amount of energy independent of the energy levels.

Electrons in the orbit closest to the nucleus have the least amount of energy.

Electrons in the outermost orbits farthest from the nucleus are the most stable.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm