Apiece of unknown metal with mass 68.6 g is heated to an initial temperture of 100°c and dropped in 84 g of water (with an initial temperture of 22°c) in a calorimeter. the final temperture of the system is 52.1°c. the specific heat of water is 4.184 j/g*°c. what is the specific heat of the metal?
a. 0.171
b. 0.343
c. 1.717
d. 3.433

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.