20 gram of 40% pure calcium carbonate reacts with 5g of HCl to produce calcium chloride, water and carbon dioxide.
a)Find which one is limiting se agent?
b)Calculate the mass of calcium chloride formed?
c)How much molecules of water is formed ?
d)Calculate the volume of carbon dioxide produced at
27°C and 0.5 atm pressure​

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.