A. 207 kJ
B. 4730 kJ
C. 9460 kJ
D. 414 kJ

Explanation:

The formula we must use is given to us:

q is the energy, m is the mass, and L(vapor) is the latent heat of vaporization.

The energy is what we calculate and the mass is 2 kilograms. We need to find the latent heat of vaporization, which is on the table.

Now we know:

Substitute the values into the formula.

Multiply. Note that the kilograms (kg) will cancel each other out.

9460 kilojoules are required to vaporize 2 kilograms of copper.

a

explanation:

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.