Arrange these Alkaline Earth metals from lowest to highest electronegativity: Ca, Be, Ba, Sr

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

I’m an electrically neutral atomic any element, there are equal numbers of