Create a dictionary named elements where each key is an element's symbol $($e$.$g$.,\text{'}$H$\text{'},$

$\text{'}$O$\text{'},\text{'}$N$\text{'}),$ and its value is another dictionary with keys 'atomic$\_$number' and 'atomic$\_$weight'

corresponding to its properties. Include at least $5$ elements in your dictionary, then write a

function to print the properties of a given element by its symbol.