Explain the trends you observed for bromine, chlorine, magnesium, sodium, and phosphorus. Explain whether they matched the predicted periodic trends.

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

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

In which of the following is positive work done by a person on a suitcase