Lithium, sodium, and potassium are examples of a) non-metals b) alkali metals c) transition metals d) alkaline earth metals submit

Which is not true about oxygen-17 and oxygen-18?

How do you count the total number of atoms present on one side of a chemical equation?

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