The relationship between molecular velocities and temperature is a relationship.

1. indirect
2. direct
3. inversely proportional
4. secondary

2. direct

Explanation:

The temperature of a gas is directly related to average molecular velocity and kinetic energy. A gas molecule moves in a straight line until it hits another molecule or the inside surface of the container. If the temperature of a gas goes up, then the average velocity of the molecules increases.

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.