Topic :- the mole concept 1.) based on the reading and understanding of the lesson pages, summarize and discuss in a own words the important topics that are covered this in a chapter of mole concept.
2.) discuss how these themes relate to a personal or professional experience.!

HINT:- read a chapter on a online and also these are a chapter topics and you need to get discuss about this from a chapter
The mole concept, molar mass and empirical:molecular formulas.

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

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.

can you attach the