A sealed cylinder of gas contains carbon dioxide at 1.00 x10 kPa (pressure) and a temperature of 25'C. When the cylinder is left in the sun, the temperature of the carbon
dioxide gas increases to 50°C. What is the new pressure (in kPa) in the cylinder if the
volume remains constant?

the answer to this question is 3.

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.