How many moles of silicon (si) atoms are equivalent to 65.8g si? a) 0.427 g b) 2.34 mol c) 4.70 g d) 1,850 mol explain this because i'm hopeless and

using the periodic table find the molar mass of silicon

(28.0855)

 then divide the grams by that:

65.8 / 28.0855 = 2.34

Answer is B.

I explained it like you asked.

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the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.