What is the asthenosphere? Question 3 options:

The hot, rigid inner part of the upper mantle which can’t flow

The hot, weak inner part of the upper mantle which can flow

The hot, weak outer part of the lower mantle

None of the above

None of the Above

Explanation:

The Athenosphere is able to flow but is also part of the UPPER LAYER meaning none of these choices are correct

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.