Question: answer and show all work please 6. Which elements are alkaline earth metals? a. sodium b. magnesium c. aluminum d. potassium e. calcium 7. If

answer and show all work please

6. Which elements are alkaline earth metals? a. sodium b. magnesium c. aluminum d. potassium e. calcium 7. If the atomic radius of osmium atoms is 1.341010m, how many osmium atoms are needed to make a line that is 5.85m in length? 8. A potassium atom has core electrons and valence electrons. 9. How many protons are in the nucleus of each element? a. sulfur b. uranium c. calcium d. lithium 10. Because the distribution of isotopes is different on different planets in the solar system, the average atomic mass of any element differs from planet to planet. Assume that on Mercury, a rather hot planet, there is more deuterium left in the atmosphere than on Earth, so that 92.55% of the hydrogen on Mercury is 1H, while the remainder is 2H. What is the atomic mass of hydrogen on Mercury? The atomic weight of 1H is 1.0078amu. The atomic weight of 2H is 2.0141amu

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