Me
which rock is not sedimentary?
a. shale
b. schist
c. limestone
d. sandstone

The answer is option B "schist." Schist is a metamorphic rock and metamorphic rocks are formed by intense heat and pressure. It wouldn't be options A, C, or D because these are indeed sedimentary rocks which are formed by deposition and compaction.

Hope this helps.

Schist is not an example of sedimentary rocks.

Explanation:

Sedimentary rocks are formed by the continual deposition of small particles carried in rivers and deposited in lakes or oceans which are subsequently cemented over time due to pressure from the upper layers and presence of some minerals at the Earth's surface. They are majorly in layers and the three types are; organic, chemical and clastic. Common examples are; sandstone, limestone, and shale.

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.

its first and third is your answer i did the qustion the fourth isnt right