If you freeze 5 mL of water into ice and then let it melt, how much water will you have? None
5 mL
10 mL
Unlimited

5 MLS

Explanation:

This is true because energy can't be created nor destroyed. So If you have

5 mills of water. you will always have 5 mills of water. The reason for this is because the water just changes state from a liquid to a solid. If you turn it back into a Liquid. You will have the same amount.

the role of the microscope world in creating new materials .

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.