Quiz
1. which of the following is the most reasonable explanation for a drop in
temperature of a gas?
a an increase in the average potential energy of the gas particles
b a decrease in the average kinetic energy of the gas particles
oc a decrease in the volume of the container
od an increase in gas 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.

window cleaner is ammonia dissolved in water. this is an example of a