Science explain Giselle makes a model, using foam balls, to represent
the events in a solar eclipse. To demonstrate this
phenomenon best, the foam ball model should have
which characteristic?

a. The ability of each ball to rotate on its own axis

b. The ability of balls to revolve around each other

C. A source of light within each ball

d.
A different color for each ball

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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plasma - state of matter made up of electrically charged particles