Hester is arranging her vase collection on a bookshelf. She wants to minimize the total gravitational potential energy of the vases and shelf unit. Assuming she can only put one item on a shelf and the shelves are equidistant apart , what would be the best method of arranging the items?

Select one

1. Put the items in ascending order of weight going from the top shelf to the bottom

2. Put the heaviest items on the middle shelves and the lighter items on top and bottom

3. Put me lightest on te middle shelves and heavier items on top and bottom

4. Put the items in descending order weight going from the top shelf to bottom

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

the answer is 0.8m.

by: nicholas

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.