PLEASE HELP!
Name two elements that have the Lewis dot diagram shown in the image.

Nitrogen and Phosphorus

Explanation:

Generally as we know, the lewis dot diagrams for elements use the number of valence electrons that the element has

From the diagram above, we can see that the element in question has 5 valence electrons

so therefore, we need two elements with 5 valence electrons

These are elements are nitrogen (2,5) and phosphorus (2,8,5)

learn it on the intertant so you can solve

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be