According to the following electron structure, how many valence electrons do these fluorine have?
f=1s22s22p5

Answer : Fluorine has Seven valence electrons.

Explanation :

Element = Fluorine

Atomic number = 9

Number of electrons = 9

Electronic configuration =

Electron structure is also known as electronic configuration. It is defined as the arrangement of electrons of an atom in an atomic orbitals.

According to Electron configuration, the 2s and 2p are the outermost energy shell and the number of electrons in 2s and 2p are 2 & 5 respectively. That means Fluorine has '7' valence electrons.

The electron structure of fluorine is shown below.

the answer is

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :