Unuy vulence electrons
2. as you move from left to right in the groups,
a. add rings/energy levels
b. take away rings/energy levels
c. add valence electrons (up to 8)
d. take away valence electrons
an atom has an atomis number of 18 and an at

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move