A student determines that the density of lead is 10.8g/cm^3. The accepted value for the density of lead is 11.4g/cm^3. What is the error in this student’s measurement?

Explanation:

The percentage error of a certain measurement can be found by using the formula

actual density = 11.4g/cm³

error = 11.4 - 10.8 = 0.6

We have

We have the final answer as

Hope this helps you

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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explanation:

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