Which represent correct variations of the formula for speed? check all that apply. t = s = t = s = dt d = st d =

Explanation :

Speed of an object is defined as the total distance covered divided by total time taken by it.

Mathematically, it can be written as :

Let d is the total distance covered and t is the time taken. Then the speed s is given by :

Distance is taken in meters (m).

Time is taken in seconds (s).

So, the speed of an object is taken in m/s.

Hence, this is the required solution.

t = d/s , s= d/t d= st

Explanation:

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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.

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