Assertion: Metals like Na, K, Ca, Mg are never found in their free state in nature. Reason: Metals are very reactive elements, so it combines with other non -metals to complete its

A)Both Assertion and Reason are correct and reason is the correct explanation of assertion.
B)Both Assertion and reason are correct but reason is not the correct explanation of assertion. C)Assertion is correct and reason is incorrect.
D)Assertion is incorrect and reason is correct

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Compared with the freezing-point depression of a 0.01 m c6h12o6 solution, the freezing-point depression of a 0.01 m nacl solution is

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.

Which of the following is not true about the atomic model of substances?